WO2022219773A1 - Machine tool - Google Patents

Machine tool Download PDF

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Publication number
WO2022219773A1
WO2022219773A1 PCT/JP2021/015559 JP2021015559W WO2022219773A1 WO 2022219773 A1 WO2022219773 A1 WO 2022219773A1 JP 2021015559 W JP2021015559 W JP 2021015559W WO 2022219773 A1 WO2022219773 A1 WO 2022219773A1
Authority
WO
WIPO (PCT)
Prior art keywords
axis direction
saddle
guide
axial direction
column
Prior art date
Application number
PCT/JP2021/015559
Other languages
French (fr)
Japanese (ja)
Inventor
雅彦 森
充 多賀
忠治 森本
喜則 山本
辰哉 合澤
勇介 池田
成弘 入野
洋介 樋口
英貴 原
Original Assignee
Dmg森精機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Dmg森精機株式会社 filed Critical Dmg森精機株式会社
Priority to EP21936969.1A priority Critical patent/EP4324591A1/en
Priority to CN202180097072.0A priority patent/CN117157168A/en
Priority to JP2023514271A priority patent/JPWO2022219773A1/ja
Priority to PCT/JP2021/015559 priority patent/WO2022219773A1/en
Publication of WO2022219773A1 publication Critical patent/WO2022219773A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/25—Movable or adjustable work or tool supports
    • B23Q1/44—Movable or adjustable work or tool supports using particular mechanisms
    • B23Q1/56—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism
    • B23Q1/60—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism two sliding pairs only, the sliding pairs being the first two elements of the mechanism
    • B23Q1/62—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism two sliding pairs only, the sliding pairs being the first two elements of the mechanism with perpendicular axes, e.g. cross-slides
    • B23Q1/621—Movable or adjustable work or tool supports using particular mechanisms with sliding pairs only, the sliding pairs being the first two elements of the mechanism two sliding pairs only, the sliding pairs being the first two elements of the mechanism with perpendicular axes, e.g. cross-slides a single sliding pair followed perpendicularly by a single sliding pair
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
    • B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work

Definitions

  • This invention relates to machine tools.
  • Patent Document 1 discloses a fixed bed, a column extending vertically upward at the rear end of the fixed bed, and a column supported movably in the left-right (X-axis) direction.
  • a horizontal machining center is disclosed that includes a saddle and a turret base supported by the saddle so as to be movable in the vertical (Y-axis) direction.
  • a machine tool that includes a saddle that supports a tool spindle, and in which the center axis of rotation of the tool held by the tool spindle extends horizontally.
  • the object of the present invention is to solve the above problems, and to provide a machine tool capable of reducing the weight of the saddle and suppressing the vibration of the saddle.
  • a machine tool includes a bed, a column erected on the bed, a saddle that is a movable body supported by the column, and a first axis that is supported by the saddle and extends in a first horizontal direction. and a tool spindle that rotates the tool around the central axis of rotation.
  • the saddle has a frame portion that surrounds the tool spindle. The thickness of the frame portion in the first axial direction varies along the second axial direction parallel to the vertical direction, and becomes maximum at a first position closer to the upper end portion of the frame portion than the lower end portion of the frame portion.
  • the thickness of the frame portion in the first axial direction changes along the second axial direction, so that the thickness of the frame portion is ensured to be large over the entire area in the second axial direction.
  • the weight of the saddle can be reduced compared to the case.
  • the bed supports the lower end of the column, the saddle supported by the column tends to vibrate at a position near the upper end of the frame.
  • the rigidity of the saddle at the first position is improved and the vibration of the saddle is reduced. can be effectively suppressed.
  • the saddle is horizontally movable with respect to the column in a third axial direction perpendicular to the first axial direction.
  • the tool spindle is movable relative to the saddle in the second axis direction.
  • the machine tool further includes a first guide portion that guides the saddle along the third axis and is arranged at the first position along the second axis.
  • the saddle is supported by the first guide portion at the first position, so vibration of the saddle can be suppressed more effectively.
  • the machine tool further includes a second guide portion that guides the saddle in the third axial direction and is arranged at a second position lower than the first position in the second axial direction.
  • the thickness of the column in the first axial direction at the second position is greater than the thickness of the column in the first axial direction at the first position.
  • the column on the lower end side supported by the bed is relatively thick in the first direction at the second position below the first position. ensure sufficient thickness. As a result, the column is supported more firmly by the bed, so that the vibration of the saddle can be suppressed more effectively.
  • the column has a first guide mounting surface and a second guide mounting surface to which the first guide portion and the second guide portion are mounted, respectively.
  • the saddle has a third guide mounting surface and a fourth guide mounting surface that face the first guide mounting surface and the second guide mounting surface in the first axial direction, and to which the first guide portion and the second guide portion are mounted, respectively.
  • the first and second guide mounting surfaces and the third and fourth guide mounting surfaces face each other in the first axial direction.
  • the work of attaching the first guide portion and the second guide portion to the column or the saddle can be easily performed.
  • the machine tool includes a first feeding device arranged at a position closer to the first guide than the second guide in the second axial direction and driving the saddle in the third axial direction;
  • a second feeding device is provided at a position closer to the second guide than the first guide and drives the saddle in the third axial direction.
  • the machine tool configured in this way, it is possible to suppress the difference between the driving force on the first guide portion side and the driving force on the second guide portion side. Thereby, the saddle can be moved more stably in the direction of the third axis.
  • the frame portion has a first gradually decreasing portion in which the thickness of the frame portion in the first axial direction decreases from the first position toward the upper end portion of the frame portion in the second axial direction, and a second gradually decreasing portion in which the thickness of the frame portion decreases from the first position toward the lower end portion of the frame portion in the second axial direction;
  • the weight of the saddle can be further reduced.
  • the tool spindle is movable in the second axial direction with respect to the saddle.
  • the center axis of rotation is positioned at the same height as the first position or above the first position in the direction of the second axis. .
  • the thickness of the frame portion in the first axis direction is less than the lower end portion of the frame portion. Vibration of the saddle can be effectively suppressed by maximizing at the first position near the upper end.
  • FIG. 2 is a top view showing the machine tool in FIG. 1;
  • FIG. 2 is a side view showing the machine tool in FIG. 1;
  • FIG. 2 is a front view showing the machine tool in FIG. 1;
  • FIG. 2 is a perspective view showing a saddle in FIG. 1;
  • FIG. 2 is a top view showing the saddle in FIG. 1;
  • FIG. 2 is a side view showing the saddle in FIG. 1;
  • FIG. 4 is a side view showing an enlarged area surrounded by a two-dot chain line VIII in FIG. 3;
  • FIG. 4 is a side view showing an enlarged area surrounded by a two-dot chain line IX in FIG.
  • FIG. 4 is a side view showing the machine tool when the tool spindle is positioned at the upper stroke end in the Y-axis direction;
  • FIG. 4 is a side view showing the machine tool when the tool spindle is positioned at the lower stroke end in the Y-axis direction;
  • FIG. 1 is a perspective view showing a machine tool according to an embodiment of the invention.
  • 2 is a top view showing the machine tool in FIG. 1.
  • FIG. 3 is a side view showing the machine tool in FIG. 1.
  • FIG. 4 is a front view showing the machine tool in FIG. 1.
  • machine tool 100 in the present embodiment is a machining center that processes a workpiece by bringing a rotating tool into contact with the workpiece.
  • the machine tool 100 is a horizontal machining center in which the central axis of rotation of the tool extends horizontally.
  • the machine tool 100 is an NC (Numerically Controlled) machine tool in which various operations for machining a workpiece are automated by numerical control by a computer.
  • an axis parallel to the horizontal direction and parallel to the center axis of rotation of the tool is referred to as the "Z-axis (first axis)”
  • an axis parallel to the vertical direction is referred to as the "Y-axis (second axis). )”
  • an axis parallel to the horizontal direction and orthogonal to the center axis of rotation of the tool is called an “X-axis (third axis)”.
  • the left direction in FIG. 3 is the “+Z axis direction” and the right direction is the “ ⁇ Z axis direction”.
  • the upward direction is the “+Y axis direction” and the downward direction is the “ ⁇ Y axis direction”.
  • the right direction in FIG. 2 is the “+X axis direction” and the left direction is the “ ⁇ X axis direction”.
  • the machine tool 100 has a bed 11 , a column 21 , a saddle 31 , a cross slide 41 , a tool spindle 91 and a table 51 .
  • the bed 11 is a base member for supporting the column 21, saddle 31, cross slide 41, tool spindle 91, table 51, etc., and is installed on the floor of a factory or the like.
  • the bed 11 is made of metal such as cast iron.
  • the bed 11 has a rectangular shape with long sides extending in the Z-axis direction and short sides extending in the X-axis direction when viewed from above.
  • the total length of the bed 11 in the Y-axis direction is smaller than the total length of the bed 11 in the Z-axis direction and smaller than the total length of the bed 11 in the X-axis direction.
  • the bed 11 has a first peripheral wall portion 12 and a second peripheral wall portion 13 .
  • the first peripheral wall portion 12 and the second peripheral wall portion 13 are provided on the periphery of the bed 11 when viewed from above.
  • the first peripheral wall portion 12 and the second peripheral wall portion 13 are provided at both ends of the bed 11 in the X-axis direction.
  • the first peripheral wall portion 12 is provided at the end of the bed 11 in the -X-axis direction.
  • the second peripheral wall portion 13 is provided at the end of the bed 11 in the +X-axis direction.
  • the first peripheral wall portion 12 and the second peripheral wall portion 13 extend along the Z-axis direction while forming a wall shape that rises upward.
  • the first peripheral wall portion 12 has a first top surface 12a.
  • the second peripheral wall portion 13 has a second top surface 13a.
  • the first top surface 12a and the second top surface 13a are planes parallel to the X-axis-Z-axis plane.
  • the first top surface 12a and the second top surface 13a face upward.
  • the bed 11 further has a first stepped portion 14 and a second stepped portion 15 .
  • the first step portion 14 forms a step recessed downward from the first peripheral wall portion 12 .
  • the second step portion 15 forms a step recessed downward from the second peripheral wall portion 13 .
  • the first stepped portion 14 is provided between the first peripheral wall portion 12 and the second stepped portion 15 in the X-axis direction.
  • the second stepped portion 15 is provided between the first stepped portion 14 and the second peripheral wall portion 13 in the X-axis direction.
  • the first stepped portion 14 has a third top surface 14a.
  • the first top surface 12a is arranged above the third top surface 14a.
  • the first peripheral wall portion 12 has a convex shape protruding upward from the third top surface 14a.
  • the second stepped portion 15 has a fourth top surface 15a.
  • the second top surface 13a is arranged above the fourth top surface 15a.
  • the second peripheral wall portion 13 has a convex shape protruding upward from the fourth top surface 15a.
  • the column 21 is erected on the bed 11. Column 21 is placed on the upper surface of bed 11 .
  • the column 21 as a whole has a gate shape rising upward from the bed 11 .
  • Column 21 is fixed to bed 11 .
  • Column 21 is fastened to bed 11 using bolts.
  • the column 21 is arranged at the end of the bed 11 in the -Z-axis direction.
  • the saddle 31 is supported by the column 21.
  • the saddle 31 is provided on the front surface of the column 21 facing the +Z-axis direction.
  • the saddle 31 as a whole has a frame shape rising upward from the bed 11 .
  • the saddle 31 is a mobile body.
  • the saddle 31 is provided movably in the X-axis direction with respect to the column 21 .
  • the cross slide 41 is supported by the saddle 31.
  • the cross slide 41 is provided on the front surface of the saddle 31 facing the +Z-axis direction.
  • the cross slide 41 as a whole has a plate shape parallel to the X-axis-Y-axis plane.
  • the cross slide 41 is provided movably in the Y-axis direction (vertical direction) with respect to the saddle 31 by feed devices 42 and 43 and guide portions 46 and 47 provided on the saddle 31 and the like.
  • the tool spindle 91 is supported by the cross slide 41.
  • the tool spindle 91 is fixed with respect to the cross slide 41 .
  • the tool spindle 91 passes through the cross slide 41 and protrudes from the cross slide 41 in the +Z-axis direction and the ⁇ Z-axis direction.
  • a tool spindle 91 is supported by the column 21 via a cross slide 41 .
  • the tool spindle 91 moves in the Y-axis direction (vertical direction) together with the cross slide 41 with respect to the saddle 31 .
  • the tool spindle 91 is provided so as to be rotatable by motor drive around a rotation center axis 110 parallel to the Z-axis.
  • the tool spindle 91 holds a tool for machining a workpiece in the machine tool 100 .
  • the tool spindle 91 rotates, the tool held by the tool spindle 91 rotates about the rotation center axis 110 .
  • the table 51 is supported by the bed 11.
  • a table 51 is provided on the bed 11 .
  • the table 51 is provided at a position separated from the column 21, the saddle 31 and the cross slide 41 in the +Z-axis direction.
  • a table 51 is a device for holding a work.
  • the table 51 holds the workpiece at a position facing the tool spindle 91 in the Z-axis direction.
  • the table 51 has a work holding portion 61 and a table base 71 .
  • the work holding portion 61 is arranged between the first peripheral wall portion 12 and the second peripheral wall portion 13 in the X-axis direction.
  • the work holding portion 61 detachably holds a work.
  • a pallet P is attached to the work holding portion 61 .
  • the workpiece holding unit 61 includes a rotating mechanism (not shown) for rotating the pallet P around a rotation center axis 130 extending in the Y-axis direction, and a clamping mechanism (not shown) for clamping and unclamping the pallet P. (not shown) are built in. On the pallet P, for example, jigs such as tombstones to which works are attached are mounted.
  • the work holding portion 61 is supported by a table base 71.
  • the table base 71 is provided below the workpiece holder 61 .
  • the table base 71 is provided across the third top surface 14a and the fourth top surface 15a in the X-axis direction when viewed from above.
  • the table 51 is provided movably in the Z-axis direction with respect to the bed 11 by feeding devices 52 and 53 and guide portions 58 and 59 .
  • the feeding device 52 and the guide portion 58 are provided on the third top surface 14a.
  • the feeding device 52 and the guide portion 58 are connected to the table base 71 on the third top surface 14a.
  • the feeding device 53 and the guide portion 59 are provided on the fourth top surface 15a.
  • the feeding device 53 and the guide portion 59 are connected to the table base 71 on the fourth top surface 15a.
  • FIG. 5 is a perspective view showing the saddle in FIG. 1.
  • FIG. 6 is a top view showing the saddle in FIG. 1.
  • FIG. 7 is a side view showing the saddle in FIG. 1; FIG.
  • the saddle 31 is made of metal such as cast iron.
  • the saddle 31 has a frame portion 211 .
  • the frame portion 211 is provided as a rigid body that receives a cutting load from the tool spindle 91 during machining of the workpiece.
  • the frame portion 211 has a frame shape.
  • the frame portion 211 is provided so as to surround the tool spindle 91 .
  • the frame portion 211 has a frame shape that revolves around the rotation center axis 110 of the tool spindle 91 .
  • the total length of the frame portion 211 in the Y-axis direction is greater than the total length of the frame portion 211 in the Z-axis direction and greater than the total length of the frame portion 211 in the X-axis direction.
  • the total length of the frame portion 211 in the Y-axis direction is greater than the total length of the column 21 in the Y-axis direction.
  • the total length of the frame portion 211 in the Y-axis direction may be equal to or less than the total length of the column 21 in the Y-axis direction.
  • the total length of the frame portion 211 in the X-axis direction is smaller than the total length of the column 21 in the X-axis direction.
  • the total length (maximum thickness) of the frame portion 211 in the Z-axis direction may be smaller than the total length (maximum thickness) of the column 21 in the Z-axis direction, or greater than or equal to the total length (maximum thickness) of the column 21 in the Z-axis direction.
  • the frame portion 211 has a first side wall portion 212, a second side wall portion 213, an upper wall portion 214, and a lower wall portion 215.
  • the first side wall portion 212 and the second side wall portion 213 are provided apart from each other in the X-axis direction.
  • the first side wall portion 212 and the second side wall portion 213 extend in the Y-axis direction (vertical direction).
  • the upper wall portion 214 and the lower wall portion 215 extend in the X-axis direction.
  • the upper wall portion 214 and the lower wall portion 215 are provided apart from each other in the Y-axis direction.
  • the end of the upper wall portion 214 in the ⁇ X-axis direction is connected to the end of the first side wall portion 212 in the +Y-axis direction, and the end of the upper wall portion 214 in the +X-axis direction is connected to the second side wall in the +Y-axis direction.
  • the end of the lower wall portion 215 in the ⁇ X-axis direction is connected to the end of the first side wall portion 212 in the ⁇ Y-axis direction, and the end of the lower wall portion 215 in the +X-axis direction is connected to the first side wall portion 212 in the ⁇ Y-axis direction.
  • 2 is connected to the end of the side wall portion 213 .
  • the first side wall portion 212, the second side wall portion 213, the upper wall portion 214 and the lower wall portion 215 are integrated with each other to form a frame shape.
  • An opening 210 is provided inside each of the first sidewall 212 , the second sidewall 213 , the upper wall 214 and the lower wall 215 .
  • the opening 210 extends in the Z-axis direction.
  • a tool spindle 91 is inserted into the opening 210 .
  • the first side wall portion 212 and the second side wall portion 213 overlap a portion (rear end portion) of the tool spindle 91 when viewed in the X-axis direction.
  • the upper wall portion 214 and the lower wall portion 215 overlap a portion (rear end portion) of the tool spindle 91 when viewed in the Y-axis direction.
  • the frame portion 211 may have a shape that is symmetrical with respect to the virtual plane 201 .
  • a virtual plane 201 is a plane that is parallel to the Y-axis-Z-axis plane and includes the rotation center axis 110 of the tool spindle 91 .
  • the first side wall portion 212 and the second side wall portion 213 may have shapes that are symmetrical to each other with the virtual plane 201 interposed therebetween.
  • the upper wall portion 214 may have a symmetrical shape with respect to the virtual plane 201 .
  • the lower wall portion 215 may have a symmetrical shape with respect to the virtual plane 201 .
  • symmetrical shape referred to here does not have a strict meaning. , symmetrical with respect to the virtual plane 201 .
  • the frame portion 211 has an upper end portion 221 and a lower end portion 222 .
  • the upper end portion 221 is the tip portion of the frame portion 211 in the +Y-axis direction.
  • the upper end portion 221 is a portion of the frame portion 211 that is arranged at the highest position in the frame portion 211 .
  • the upper end portion 221 consists of the top surface of the upper wall portion 214 .
  • the lower end portion 222 is the tip portion of the frame portion 211 in the -Y-axis direction.
  • the lower end portion 222 is a portion of the frame portion 211 arranged at the lowest position in the frame portion 211 .
  • the lower end portion 222 is formed from the bottom surface of the lower wall portion 215 .
  • the saddle 31 further has an intermediate rib portion 220.
  • Intermediate rib portion 220 extends in the X-axis direction between first side wall portion 212 and second side wall portion 213 .
  • the end of the intermediate rib portion 220 in the ⁇ X-axis direction is connected to the end of the first side wall portion 212 in the ⁇ Z-axis direction, and the end of the intermediate rib portion 220 in the +X-axis direction is connected to the end of the first side wall portion 212 in the ⁇ Z-axis direction.
  • 2 is connected to the end of the side wall portion 213 .
  • the intermediate rib portion 220 is provided at a position away from the upper wall portion 214 in the ⁇ Y-axis direction and at a position away from the lower wall portion 215 in the +Y-axis direction.
  • the intermediate rib portion 220 is provided at a position closer to the upper end portion 221 than the lower end portion 222 of the frame portion 211 in the Y-axis direction.
  • the saddle 31 further has a first motor mounting portion 216 , a second motor mounting portion 217 , a first nut mounting portion 218 and a second nut mounting portion 219 .
  • the first motor mounting portion 216 is provided at the corner where the first side wall portion 212 and the upper wall portion 214 intersect.
  • the second motor mounting portion 217 is provided at a corner where the second side wall portion 213 and the upper wall portion 214 intersect.
  • the first motor mounting portion 216 and the second motor mounting portion 217 protrude from the frame portion 211 in the +Z-axis direction.
  • the first motor mounting portion 216 and the second motor mounting portion 217 as a whole have a tubular shape extending in the Y-axis direction.
  • the first motor mounting portion 216 and the second motor mounting portion 217 are provided symmetrically with respect to the virtual plane 201 .
  • the first nut mounting portion 218 protrudes from the intermediate rib portion 220 in the -Z-axis direction.
  • the second nut attachment portion 219 protrudes from the lower wall portion 215 in the ⁇ Z-axis direction.
  • the first nut mounting portion 218 and the second nut mounting portion 219 as a whole form a cylindrical shape extending in the X-axis direction and partially open in the -Z-axis direction.
  • the machine tool 100 further has a first feed device 22 and a second feed device 23.
  • a first feeder 22 and a second feeder 23 are provided on the column 21 and the saddle 31 .
  • the first feeding device 22 and the second feeding device 23 move the saddle 31 in the Z-axis direction by applying a driving force to the saddle 31 .
  • the first feeding device 22 has a servomotor 241 , a screw shaft 242 and a nut 243 .
  • the second feeding device 23 has a servomotor 246, a screw shaft 247, and a nut (not shown).
  • the screw shaft 242 extends in the X-axis direction.
  • the screw shaft 242 is rotatably supported by a plurality of bearings arranged apart from each other in the X-axis direction.
  • the nut 243 is fitted onto the screw shaft 242 via a plurality of balls.
  • a nut 243 is fixed to the saddle 31 .
  • the nut 243 is attached to the first nut attachment portion 218 .
  • the screw shaft 242 and the nut 243 constitute a ball screw.
  • the output shaft of the servomotor 241 is connected to the screw shaft 242 . Rotation from the servomotor 241 is input to the screw shaft 242 .
  • the screw shaft 247 extends in the X-axis direction.
  • the screw shaft 247 is rotatably supported by a plurality of bearings spaced apart from each other in the X-axis direction.
  • a nut (not shown) is fitted to the screw shaft 247 via a plurality of balls.
  • a nut (not shown) is fixed to the saddle 31 .
  • a nut (not shown) is attached to the second nut attachment portion 219 .
  • the screw shaft 247 and a nut (not shown) constitute a ball screw.
  • An output shaft of the servomotor 246 is connected to the screw shaft 247 . Rotation from the servomotor 246 is input to the screw shaft 247 .
  • the first feeding device 22 is provided above the second feeding device 23 .
  • the first feeding device 22 is provided at a position closer to the upper end portion 221 than the lower end portion 222 of the frame portion 211 in the Y-axis direction.
  • the second feeding device 23 is provided at a position closer to the lower end portion 222 than the upper end portion 221 of the frame portion 211 in the Y-axis direction.
  • the first feeding device 22 is provided at a position displaced from the second feeding device 23 in the -Z-axis direction.
  • FIG. 8 is a side view showing an enlarged area surrounded by a two-dot chain line VIII in FIG. 9 is a side view showing an enlarged area surrounded by a two-dot chain line IX in FIG. 3.
  • FIG. 8 is a side view showing an enlarged area surrounded by a two-dot chain line VIII in FIG. 9 is a side view showing an enlarged area surrounded by a two-dot chain line IX in FIG. 3.
  • the saddle 31 has a first guide mounting surface 231 and a second guide mounting surface 232. As shown in FIG. The first guide mounting surface 231 and the second guide mounting surface 232 are planes parallel to the X-Y axis plane. The first guide mounting surface 231 and the second guide mounting surface 232 face the -Z-axis direction.
  • the column 21 further has a third guide mounting surface 261 and a fourth guide mounting surface 262.
  • the third guide mounting surface 261 and the fourth guide mounting surface 262 are planes parallel to the X-Y axis plane.
  • the third guide mounting surface 261 and the fourth guide mounting surface 262 face the +Z-axis direction.
  • the third guide mounting surface 261 faces the first guide mounting surface 231 in the Z-axis direction.
  • the fourth guide mounting surface 262 faces the second guide mounting surface 232 in the Z-axis direction.
  • the machine tool 100 further has a first guide portion 26 and a second guide portion 27. As shown in FIG.
  • the first guide portion 26 and the second guide portion 27 are provided on the column 21 and the saddle 31 .
  • the first guide portion 26 and the second guide portion 27 guide the saddle 31 in the X-axis direction.
  • the first guide portion 26 is attached to the first guide attachment surface 231 and the third guide attachment surface 261 .
  • the first guide portion 26 has a rail 251 and sliders 252 and 253 .
  • the rail 251 extends in the X-axis direction.
  • the rail 251 is fastened to the third guide mounting surface 261 using bolts.
  • the sliders 252 and 253 are fitted to the rail 251 via a plurality of balls.
  • the sliders 252 and 253 are slidable in the X-axis direction by being guided by the rails 251 .
  • the sliders 252 and 253 are provided apart from each other in the X-axis direction.
  • the sliders 252 and 253 are fastened to the first guide mounting surface 231 using bolts.
  • the rail 251 and the sliders 252 and 253 constitute a linear guide, which is a linear guide mechanism.
  • the second guide portion 27 is attached to the second guide attachment surface 232 and the fourth guide attachment surface 262 .
  • the second guide portion 27 has a rail 256 and sliders 257 and 258 .
  • Rail 256 extends in the X-axis direction.
  • the rail 256 is fastened to the fourth guide mounting surface 262 using bolts.
  • the sliders 257 and 258 are fitted to the rail 256 via a plurality of balls.
  • the sliders 257 and 258 are slidable in the X-axis direction by being guided by the rails 256 .
  • the sliders 257 and 258 are provided apart from each other in the X-axis direction.
  • the sliders 257 and 258 are fastened to the second guide mounting surface 232 using bolts.
  • the rail 256 and the sliders 257 and 258 constitute a linear guide, which is a linear guide mechanism.
  • the first guide portion 26 is provided above the second guide portion 27 .
  • the first guide portion 26 is provided at a position closer to the upper end portion 221 than the lower end portion 222 of the frame portion 211 in the Y-axis direction.
  • the second guide portion 27 is provided at a position closer to the lower end portion 222 than the upper end portion 221 of the frame portion 211 in the Y-axis direction.
  • the first guide portion 26 is provided at a position displaced from the second guide portion 27 in the ⁇ Z-axis direction.
  • the operator places the column 21 in a position in which the rear surface of the column 21 facing the -Z axis direction lies on the floor, and installs the third guide.
  • a rail 251 is attached to the surface 261 and a rail 256 is attached to the fourth guide attachment surface 262 .
  • the third guide mounting surface 261 and the fourth guide mounting surface 262 face the first guide mounting surface 231 and the second guide mounting surface 232, respectively, in the Z-axis direction.
  • the third guide mounting surface 261 and the fourth guide mounting surface 262 face upward. This facilitates the work of assembling the first guide portion 26 and the second guide portion 27 to the column 21 .
  • the column 21 further has a fifth guide mounting surface 226 and a sixth guide mounting surface 227, as shown in FIGS.
  • the fifth guide mounting surface 226 and the sixth guide mounting surface 227 are planes parallel to the X-Y axis plane.
  • the fifth guide mounting surface 226 and the sixth guide mounting surface 227 face the +Z-axis direction.
  • the fifth guide mounting surface 226 and the sixth guide mounting surface 227 are provided at the end of the frame portion 211 in the +Z-axis direction.
  • the fifth guide mounting surface 226 and the sixth guide mounting surface 227 are provided apart from each other in the X-axis direction.
  • a fifth guide mounting surface 226 and a sixth guide mounting surface 227 are provided on the first side wall portion 212 and the second side wall portion 213, respectively.
  • the fifth guide mounting surface 226 and the sixth guide mounting surface 227 extend in a belt shape along the Y-axis direction.
  • a rail of the guide portion 46 that guides the cross slide 41 in the Y-axis direction is attached to the fifth guide attachment surface 226 .
  • a rail of the guide portion 47 that guides the cross slide 41 in the Y-axis direction is attached to the sixth guide attachment surface 227 .
  • the thickness B of the frame portion 211 in the Z-axis direction changes along the Y-axis direction.
  • Each thickness B of the first side wall portion 212 and the second side wall portion 213 in the Z-axis direction varies along the Y-axis direction.
  • the thickness B of the frame portion 211 in the Z-axis direction may change in a partial section between the upper end portion 221 and the lower end portion 222 of the frame portion 211, or may vary between the upper end portion 221 and the lower end portion 222 of the frame portion 211. may vary over the entire interval in between. That is, the frame portion 211 has at least a partial section between the upper end portion 221 and the lower end portion 222 of the frame portion 211 in which the thickness B of the frame portion 211 in the Z-axis direction changes along the Y-axis direction.
  • the thickness B of the frame portion 211 in the Z-axis direction becomes maximum (maximum thickness Bmax) at a first position Pa closer to the upper end portion 221 of the frame portion 211 than the lower end portion 222 of the frame portion 211 .
  • the length between upper end portion 221 and first position Pa in the Y-axis direction is smaller than the length between first position Pa and lower end portion 222 in the Y-axis direction.
  • the first position Pa corresponds to a predetermined range in the Y-axis direction where the frame portion 211 has the maximum thickness Bmax.
  • the frame portion 211 has a length (total length) H between the upper end portion 221 and the lower end portion 222 in the Y-axis direction.
  • the frame portion 211 has a length H/2 between the upper end portion 221 and the intermediate position Ph in the Y-axis direction, and a length H/2 between the intermediate position Ph and the lower end portion 222 in the Y-axis direction. have.
  • the intermediate position Ph is located at the center between the upper end portion 221 and the lower end portion 222 in the Y-axis direction.
  • the first position Pa is located above the intermediate position Pa.
  • the first position Pa is positioned closer to the intermediate position Ph than the upper end portion 221 in the Y-axis direction.
  • the first position Pa may be positioned closer to the upper end portion 221 than the intermediate position Ph, or may be positioned at the center between the upper end portion 221 and the intermediate position Ph in the Y-axis direction.
  • the first guide portion 26 (rail 251, slider 252, slider 253) is arranged at a first position Pa in the Y-axis direction.
  • the first guide mounting surface 231 is arranged at the first position Pa in the Y-axis direction.
  • the center position of the rail 251 in the Y-axis direction is located at the first position Pa.
  • the maximum thickness Bmax of the frame portion 211 in the Z-axis direction approximately corresponds to the length between the first guide mounting surface 231 and the fifth and sixth guide mounting surfaces 226 and 227.
  • the second guide portion 27 (rail 256, slider 257, slider 258) is arranged at a second position Pb in the Y-axis direction.
  • the second guide mounting surface 232 is arranged at the second position Pb in the Y-axis direction.
  • the second position Pb corresponds to the center position of the rail 256 in the Y-axis direction.
  • the second position Pb is located below the first position Pa.
  • the second position Pb is positioned closer to the lower end portion 222 than the upper end portion 221 of the frame portion 211 in the Y-axis direction.
  • the second position Pb is positioned closer to the lower end portion 222 than the intermediate position Ph in the Y-axis direction.
  • the second position Pb may be located closer to the intermediate position Ph than the lower end portion 222 in the Y-axis direction, or may be located at the center between the intermediate position Ph and the lower end portion 222 .
  • the frame portion 211 has a thickness Bb in the Z-axis direction at the second position Pb.
  • the thickness Bb of the frame portion 211 in the Z-axis direction is approximately the length between the second guide mounting surface 232 and the fifth and sixth guide mounting surfaces 226 and 227 .
  • the maximum thickness Bmax of the frame portion 211 in the Z-axis direction may be twice or more the thickness Bb of the frame portion 211 in the Z-axis direction, or may be three times or more (Bmax ⁇ 2Bb, Bmax ⁇ 3Bb ).
  • the thickness Cb of the column 21 in the Z-axis direction at the second position Pb is greater than the thickness Ca of the column 21 in the Z-axis direction at the first position Pa (Cb>Ca).
  • the thickness Cb of the column 21 in the Z-axis direction may be 1.5 times or more the thickness Ca of the column 21 in the Z-axis direction, or may be 2 times or more (Cb ⁇ 1.5Ca, Cb ⁇ 2 Ca).
  • the first feeding device 22 is arranged at a third position Pc closer to the first guide portion 26 than the second guide portion 27 in the Y-axis direction.
  • the second feeding device 23 is arranged at a fourth position Pd closer to the second guide portion 27 than the first guide portion 26 in the Y-axis direction.
  • the third position Pc corresponds to the position of the rotation center axis of the screw shaft 242
  • the fourth position Pd corresponds to the position of the rotation center axis of the screw shaft 247 .
  • the third position Pc is positioned closer to the upper end portion 221 than the lower end portion 222 of the frame portion 211 in the Y-axis direction.
  • the third position Pc is located above the first position Pa.
  • the first feeding device 22 is provided side by side with the first guide portion 26 in the Y-axis direction (vertical direction).
  • the fourth position Pd is positioned closer to the lower end portion 222 than the upper end portion 221 of the frame portion 211 in the Y-axis direction.
  • the fourth position Pd is located above the second position Pb.
  • the second feeding device 23 is provided side by side with the second guide portion 27 in the Y-axis direction (vertical direction).
  • the first feeding device 22 is arranged at the third position Pc closer to the first guide portion 26 than the second guide portion 27 in the Y-axis direction, and the second feeding device 23 is arranged in the Y-axis direction. Since it is arranged at the fourth position Pd closer to the second guide portion 27 than the first guide portion 26 in the axial direction, the driving force on the first guide portion 26 side and the driving force on the second guide portion 27 side It is possible to suppress the occurrence of a difference in force. Thereby, the saddle 31 can be moved more stably in the X-axis direction.
  • first feeding device 22 and the first guide portion 26 may be provided alternately in the Y-axis direction (vertical direction), and the second feeding device 23 and the second guide portion 27 may be provided in the Y-axis direction. (in the vertical direction), they may be provided alternately with each other.
  • the frame portion 211 has a first tapered portion 236 and a second tapered portion 237 .
  • a thickness B of the frame portion 211 in the Z-axis direction decreases from the first position Pa toward the upper end portion 221 at the first gradually decreasing portion 236 .
  • the first gradually decreasing portion 236 is provided between the first position Pa and the upper end portion 221 in the Y-axis direction.
  • a thickness B of the frame portion 211 in the Z-axis direction decreases from the first position Pa toward the lower end portion 222 at the second gradually decreasing portion 237 .
  • the second gradually decreasing portion 237 is provided between the first position Pa and the fourth position Pd in the Y-axis direction.
  • the frame portion 211 When viewed in the X-axis direction, the frame portion 211 as a whole has a base extending in the Y-axis direction at the end in the +Z-axis direction and extending in the ⁇ Z-axis direction and the ⁇ Y-axis direction from the upper end of the base. It has a triangular shape having a first oblique side and a second oblique side extending in the ⁇ Z-axis direction and the +Y-axis direction from the lower end of the base and intersecting the first oblique side at a first position Pa.
  • the column 21 as a whole has a first side extending in the Y-axis direction at the end in the -Z-axis direction and a +Z-axis from the lower end of the first side.
  • a triangle having a second side that extends in the axial direction and has a length smaller than that of the first side, and an oblique side that extends in the +Z-axis direction and the -Y-axis direction from the upper end of the first side and intersects with the second side. have a shape.
  • the thickness B of the frame portion 211 in the Z-axis direction varies along the Y-axis direction.
  • the weight of the saddle 31 can be reduced as compared with the case.
  • the moment of inertia of the saddle 31 moving in the X-axis direction can be reduced to suppress vibrations that occur during machining of the workpiece.
  • the saddle 31 supported by the column 21 tends to vibrate at a position closer to the upper end 221 than the lower end 222 of the frame portion 211 .
  • the rigidity of the saddle 31 at the first position Pa can increase As a result, even if the cutting load of the workpiece is transmitted to the saddle 31 through the tool spindle 91, the vibration of the saddle 31 can be effectively suppressed.
  • the first guide portion 26 is arranged at the first position Pa where the thickness B of the frame portion 211 in the Z-axis direction is maximized.
  • the saddle 31 is supported by the first guide portion 26 at the first position Pa, so vibration of the saddle 31 can be suppressed more effectively.
  • the thickness Cb of the column 21 in the Z-axis direction at the second position Pb below the first position Pa is greater than the thickness Ca of the column 21 in the Z-axis direction at the first position Pa.
  • the frame portion 211 also has a first gradually decreasing portion 236 and a second gradually decreasing portion 237 .
  • the thickness B of the frame portion 211 in the Z-axis direction decreases from the first position Pa toward the upper end portion 221, and at the second gradually decreasing portion 237, the thickness B of the frame portion 211 in the Z-axis direction decreases.
  • the weight of the saddle 31 can be reduced since it decreases from the first position Pa toward the lower end portion 222 .
  • FIG. 10 is a side view showing the machine tool when the tool spindle is positioned at the upper stroke end in the Y-axis direction.
  • FIG. 11 is a side view showing the machine tool when the tool spindle is positioned at the lower stroke end in the Y-axis direction.
  • the rotation center axis 110 of the tool spindle 91 is arranged at the fifth position Pe in the Y-axis direction. ing.
  • the fifth position Pe is located above the first position Pa in the Y-axis direction.
  • the fifth position Pe is positioned between the first position Pa and the third position Pc in the Y-axis direction.
  • the fifth position Pe may be located at the same height as the first position Pa.
  • the thickness B of the frame portion 211 in the Z-axis direction is maximized at the first position Pa. Therefore, the vibration of the saddle 31 can be effectively suppressed.
  • the rotation center axis 110 of the tool spindle 91 is arranged at the sixth position Pf in the Y-axis direction. ing.
  • the sixth position Pf is located below the fourth position Pd in the Y-axis direction.
  • the sixth position Pf may be located at the same height as the fourth position Pd or above the fourth position Pd in the Y-axis direction.
  • the sixth position Pf is located above the second position Pb in the Y-axis direction.
  • machine tool 100 comprises bed 11, column 21 erected on bed 11, and column 21.
  • a saddle 31 which is a supported moving body, and a tool spindle 91 which is supported by the saddle 31 and which rotates the tool around a rotation center axis 110 extending in the Z-axis direction as the first axial direction parallel to the horizontal direction.
  • the saddle 31 has a frame portion 211 that surrounds the tool spindle 91 .
  • the thickness B of the frame portion 211 in the Z-axis direction varies along the Y-axis direction as the second axial direction parallel to the vertical direction, and is closer to the upper end portion 221 of the frame portion 211 than the lower end portion 222 of the frame portion 211 . It becomes maximum at the first position Pa.
  • the weight of the saddle 31 can be reduced, and vibration of the saddle 31 during machining of the workpiece can be suppressed. Thereby, the machining accuracy of the workpiece can be improved.
  • the present invention is not limited to a horizontal machining center. It may be a processing machine.
  • This invention is mainly applied to machine tools such as horizontal machining centers or multitasking machines.

Abstract

This machine tool comprises a bed (11), a column (21) erected on the bed (11), a saddle (31) that is a moving body supported by the column (21), and a tool main shaft (91) that is supported by the saddle (31) and that causes a tool to rotate about a rotation central axis (110) extending in a Z-axis direction parallel to the horizontal direction. The saddle (31) has a frame part (211) provided so as to surround the tool main shaft (91). The Z-axis-direction thickness of the frame part (211) changes along the Y-axis direction parallel to the plumb vertical direction, said thickness being greatest at a first position (Pa) that is closer to an upper-end section (221) of the frame part (211) than to a lower-end section (222) of the frame part (211).

Description

工作機械Machine Tools
　この発明は、工作機械に関する。 This invention relates to machine tools.
　たとえば、特開２００５－８８０９９号公報（特許文献１）には、固定ベッドと、固定ベッドの後端部に垂直上方に延びるコラムと、コラムにより左右（Ｘ軸）方向に移動可能に支持されるサドルと、サドルにより上下（Ｙ軸）方向に移動可能に支持されるタレットベースとを備える横形マシニングセンタが開示されている。 For example, Japanese Patent Laying-Open No. 2005-88099 (Patent Document 1) discloses a fixed bed, a column extending vertically upward at the rear end of the fixed bed, and a column supported movably in the left-right (X-axis) direction. A horizontal machining center is disclosed that includes a saddle and a turret base supported by the saddle so as to be movable in the vertical (Y-axis) direction.
特開２００５－８８０９９号公報JP-A-2005-88099
　工具主軸を支持するサドルを備え、工具主軸によって保持される工具の回転中心軸が水平方向に延びる工作機械が知られている。 A machine tool is known that includes a saddle that supports a tool spindle, and in which the center axis of rotation of the tool held by the tool spindle extends horizontally.
　このような工作機械においては、移動体であるサドルの慣性モーメントを小さくするため、サドルの重量を低減することが求められる。一方、ワークの切削負荷が工具主軸を通じてサドルに伝わると、サドルが大きく振動する可能性がある。この場合、ワークの加工精度が低下してしまうため、サドルの振動を抑制することが求められる。 In such machine tools, it is required to reduce the weight of the saddle, which is a moving body, in order to reduce the moment of inertia of the saddle. On the other hand, if the cutting load of the workpiece is transmitted to the saddle through the tool spindle, the saddle may vibrate significantly. In this case, since the machining accuracy of the work is lowered, it is required to suppress the vibration of the saddle.
　そこでこの発明の目的は、上記の課題を解決することであり、サドルの重量を低減するとともに、サドルの振動を抑制することが可能な工作機械を提供することである。 Therefore, the object of the present invention is to solve the above problems, and to provide a machine tool capable of reducing the weight of the saddle and suppressing the vibration of the saddle.
　この発明に従った工作機械は、ベッドと、ベッド上に立設されるコラムと、コラムにより支持される移動体であるサドルと、サドルにより支持され、水平方向に平行な第１軸方向に延びる回転中心軸を中心に工具を回転させる工具主軸とを備える。サドルは、工具主軸を取り囲むように設けられるフレーム部を有する。第１軸方向におけるフレーム部の厚みは、鉛直方向に平行な第２軸方向に沿って変化し、フレーム部の下端部よりもフレーム部の上端部寄りの第１位置で最大となる。 A machine tool according to the present invention includes a bed, a column erected on the bed, a saddle that is a movable body supported by the column, and a first axis that is supported by the saddle and extends in a first horizontal direction. and a tool spindle that rotates the tool around the central axis of rotation. The saddle has a frame portion that surrounds the tool spindle. The thickness of the frame portion in the first axial direction varies along the second axial direction parallel to the vertical direction, and becomes maximum at a first position closer to the upper end portion of the frame portion than the lower end portion of the frame portion.
　このように構成された工作機械によれば、第１軸方向におけるフレーム部の厚みが第２軸方向に沿って変化するため、フレーム部の厚みを第２軸方向における全域に渡って大きく確保する場合と比較して、サドルの重量を低減することができる。また、ベッドは、コラムの下端部を支持するため、そのコラムによって支持されるサドルは、フレーム部の上端部寄りの位置で振動し易い。これに対して、第１軸方向におけるフレーム部の厚みをフレーム部の下端部よりも上端部寄りの第１位置で最大とすることによって、第１位置におけるサドルの剛性を向上させ、サドルの振動を効果的に抑制することができる。 According to the machine tool configured in this manner, the thickness of the frame portion in the first axial direction changes along the second axial direction, so that the thickness of the frame portion is ensured to be large over the entire area in the second axial direction. The weight of the saddle can be reduced compared to the case. Further, since the bed supports the lower end of the column, the saddle supported by the column tends to vibrate at a position near the upper end of the frame. On the other hand, by maximizing the thickness of the frame portion in the first axial direction at the first position closer to the upper end than the lower end of the frame portion, the rigidity of the saddle at the first position is improved and the vibration of the saddle is reduced. can be effectively suppressed.
　また好ましくは、サドルは、コラムに対して、水平方向に平行で、かつ、第１軸方向に直交する第３軸方向に移動可能である。工具主軸は、サドルに対して、第２軸方向に移動可能である。工作機械は、サドルを第３軸方向に案内し、第２軸方向において第１位置に配置される第１ガイド部をさらに備える。 Also preferably, the saddle is horizontally movable with respect to the column in a third axial direction perpendicular to the first axial direction. The tool spindle is movable relative to the saddle in the second axis direction. The machine tool further includes a first guide portion that guides the saddle along the third axis and is arranged at the first position along the second axis.
　このように構成された工作機械によれば、サドルが第１位置において第１ガイド部により支持されるため、サドルの振動をさらに効果的に抑制できる。 According to the machine tool configured in this manner, the saddle is supported by the first guide portion at the first position, so vibration of the saddle can be suppressed more effectively.
　また好ましくは、工作機械は、サドルを第３軸方向に案内し、第２軸方向において第１位置よりも下方の第２位置に配置される第２ガイド部をさらに備える。第２位置での第１軸方向におけるコラムの厚みは、第１位置での第１軸方向におけるコラムの厚みよりも大きい。 Also preferably, the machine tool further includes a second guide portion that guides the saddle in the third axial direction and is arranged at a second position lower than the first position in the second axial direction. The thickness of the column in the first axial direction at the second position is greater than the thickness of the column in the first axial direction at the first position.
　このように構成された工作機械によれば、第１位置よりも下方の第２位置での第１方向におけるコラムの厚みを相対的に大きくすることによって、ベッドにより支持される下端部側のコラムの厚みを十分に確保する。これにより、コラムがベッドによってより強固に支持されるため、サドルの振動をより効果的に抑制することができる。 According to the machine tool configured in this manner, the column on the lower end side supported by the bed is relatively thick in the first direction at the second position below the first position. ensure sufficient thickness. As a result, the column is supported more firmly by the bed, so that the vibration of the saddle can be suppressed more effectively.
　また好ましくは、コラムは、第１ガイド部および第２ガイド部がそれぞれ取り付けられる第１ガイド取り付け面および第２ガイド取り付け面を有する。サドルは、第１軸方向において第１ガイド取り付け面および第２ガイド取り付け面とそれぞれ対向し、第１ガイド部および第２ガイド部がそれぞれ取り付けられる第３ガイド取り付け面および第４ガイド取り付け面を有する。 Also preferably, the column has a first guide mounting surface and a second guide mounting surface to which the first guide portion and the second guide portion are mounted, respectively. The saddle has a third guide mounting surface and a fourth guide mounting surface that face the first guide mounting surface and the second guide mounting surface in the first axial direction, and to which the first guide portion and the second guide portion are mounted, respectively. .
　このように構成された工作機械によれば、第１ガイド取り付け面および第２ガイド取り付け面と、第３ガイド取り付け面および第４ガイド取り付け面とが、それぞれ、第１軸方向において対向するため、コラムまたはサドルに対する第１ガイド部および第２ガイド部の取り付け作業を容易に行なうことができる。 According to the machine tool configured in this manner, the first and second guide mounting surfaces and the third and fourth guide mounting surfaces face each other in the first axial direction. The work of attaching the first guide portion and the second guide portion to the column or the saddle can be easily performed.
　また好ましくは、工作機械は、第２軸方向において第２ガイド部よりも第１ガイド部寄りの位置に配置され、サドルを第３軸方向に駆動させる第１送り装置と、第２軸方向において第１ガイド部よりも第２ガイド部寄りの位置に設けられ、サドルを第３軸方向に駆動させる第２送り装置とをさらに備える。 Further preferably, the machine tool includes a first feeding device arranged at a position closer to the first guide than the second guide in the second axial direction and driving the saddle in the third axial direction; A second feeding device is provided at a position closer to the second guide than the first guide and drives the saddle in the third axial direction.
　このように構成された工作機械によれば、第１ガイド部の側の駆動力と、第２ガイド部の側の駆動力とに差が生じることを抑制できる。これにより、サドルを第３軸方向においてより安定して移動させることができる。 According to the machine tool configured in this way, it is possible to suppress the difference between the driving force on the first guide portion side and the driving force on the second guide portion side. Thereby, the saddle can be moved more stably in the direction of the third axis.
　また好ましくは、フレーム部は、第１軸方向におけるフレーム部の厚みが、第２軸方向において、第１位置からフレーム部の上端部に向かうに従って減少する第１漸減部と、第１軸方向におけるフレーム部の厚みが、第２軸方向において、第１位置からフレーム部の下端部に向かうに従って減少する第２漸減部とを含む。 Further preferably, the frame portion has a first gradually decreasing portion in which the thickness of the frame portion in the first axial direction decreases from the first position toward the upper end portion of the frame portion in the second axial direction, and a second gradually decreasing portion in which the thickness of the frame portion decreases from the first position toward the lower end portion of the frame portion in the second axial direction;
　このように構成された工作機械によれば、サドルの重量をさらに低減することができる。 According to the machine tool configured in this way, the weight of the saddle can be further reduced.
　また好ましくは、工具主軸は、サドルに対して、第２軸方向に移動可能である。工具主軸が第２軸方向において上方側のストローク端に位置決めされた場合に、回転中心軸は、第２軸方向において、第１位置と同じ高さ、または、第１位置よりも上方に位置する。 Also preferably, the tool spindle is movable in the second axial direction with respect to the saddle. When the tool spindle is positioned at the stroke end on the upper side in the direction of the second axis, the center axis of rotation is positioned at the same height as the first position or above the first position in the direction of the second axis. .
　このように構成された工作機械によれば、工具主軸が第２軸方向において上方側のストローク端に移動した場合であっても、第１軸方向におけるフレーム部の厚みをフレーム部の下端部よりも上端部寄りの第１位置で最大とすることによって、サドルの振動を効果的に抑制することができる。 According to the machine tool configured in this way, even when the tool spindle moves to the stroke end on the upper side in the second axis direction, the thickness of the frame portion in the first axis direction is less than the lower end portion of the frame portion. Vibration of the saddle can be effectively suppressed by maximizing at the first position near the upper end.
　以上に説明したように、この発明に従えば、サドルの重量を低減するとともに、サドルの振動を抑制することが可能な工作機械を提供することができる。 As described above, according to the present invention, it is possible to provide a machine tool capable of reducing the weight of the saddle and suppressing the vibration of the saddle.
この発明の実施の形態における工作機械を示す斜視図である。BRIEF DESCRIPTION OF THE DRAWINGS It is a perspective view which shows the machine tool in embodiment of this invention. 図１中の工作機械を示す上面図である。FIG. 2 is a top view showing the machine tool in FIG. 1; 図１中の工作機械を示す側面図である。FIG. 2 is a side view showing the machine tool in FIG. 1; 図１中の工作機械を示す正面図である。FIG. 2 is a front view showing the machine tool in FIG. 1; 図１中のサドルを示す斜視図である。FIG. 2 is a perspective view showing a saddle in FIG. 1; 図１中のサドルを示す上面図である。FIG. 2 is a top view showing the saddle in FIG. 1; 図１中のサドルを示す側面図である。FIG. 2 is a side view showing the saddle in FIG. 1; 図３中の２点鎖線ＶＩＩＩで囲まれた範囲を拡大して示す側面図である。FIG. 4 is a side view showing an enlarged area surrounded by a two-dot chain line VIII in FIG. 3; 図３中の２点鎖線ＩＸで囲まれた範囲を拡大して示す側面図である。FIG. 4 is a side view showing an enlarged area surrounded by a two-dot chain line IX in FIG. 3; 工具主軸がＹ軸方向において上方側のストローク端に位置決めされた場合の工作機械を示す側面図である。FIG. 4 is a side view showing the machine tool when the tool spindle is positioned at the upper stroke end in the Y-axis direction; 工具主軸がＹ軸方向において下方側のストローク端に位置決めされた場合の工作機械を示す側面図である。FIG. 4 is a side view showing the machine tool when the tool spindle is positioned at the lower stroke end in the Y-axis direction;
　この発明の実施の形態について、図面を参照して説明する。なお、以下で参照する図面では、同一またはそれに相当する部材には、同じ番号が付されている。 An embodiment of the present invention will be described with reference to the drawings. In the drawings referred to below, the same or corresponding members are given the same numbers.
　図１は、この発明の実施の形態における工作機械を示す斜視図である。図２は、図１中の工作機械を示す上面図である。図３は、図１中の工作機械を示す側面図である。図４は、図１中の工作機械を示す正面図である。 FIG. 1 is a perspective view showing a machine tool according to an embodiment of the invention. 2 is a top view showing the machine tool in FIG. 1. FIG. 3 is a side view showing the machine tool in FIG. 1. FIG. 4 is a front view showing the machine tool in FIG. 1. FIG.
　図中には、工作機械の外観をなすカバー体を透視することによって、工作機械の内部構造が示されている。 In the figure, the internal structure of the machine tool is shown by looking through the cover body that forms the exterior of the machine tool.
　図１から図４を参照して、本実施の形態における工作機械１００は、ワークに回転する工具を接触させることによって、ワーク加工を行なうマシニングセンタである。工作機械１００は、工具の回転中心軸が水平方向に延びる横形マシニングセンタである。工作機械１００は、コンピュータによる数値制御によって、ワーク加工のための各種動作が自動化されたＮＣ（Numerically　Control）工作機械である。 With reference to FIGS. 1 to 4, machine tool 100 in the present embodiment is a machining center that processes a workpiece by bringing a rotating tool into contact with the workpiece. The machine tool 100 is a horizontal machining center in which the central axis of rotation of the tool extends horizontally. The machine tool 100 is an NC (Numerically Controlled) machine tool in which various operations for machining a workpiece are automated by numerical control by a computer.
　本明細書においては、水平方向に平行で、かつ、工具の回転中心軸に平行な軸を「Ｚ軸（第１軸）」といい、鉛直方向に平行な軸を「Ｙ軸（第２軸）」といい、水平方向に平行で、かつ、工具の回転中心軸に直交する軸を「Ｘ軸（第３軸）」という。図３中における左方向が「＋Ｚ軸方向」であり、右方向が「－Ｚ軸方向」である。上方向が「＋Ｙ軸方向」であり、下方向が「－Ｙ軸方向」である。図２中における右方向が「＋Ｘ軸方向」であり、左方向が「－Ｘ軸方向」である。 In this specification, an axis parallel to the horizontal direction and parallel to the center axis of rotation of the tool is referred to as the "Z-axis (first axis)", and an axis parallel to the vertical direction is referred to as the "Y-axis (second axis). )”, and an axis parallel to the horizontal direction and orthogonal to the center axis of rotation of the tool is called an “X-axis (third axis)”. The left direction in FIG. 3 is the “+Z axis direction” and the right direction is the “−Z axis direction”. The upward direction is the “+Y axis direction” and the downward direction is the “−Y axis direction”. The right direction in FIG. 2 is the “+X axis direction” and the left direction is the “−X axis direction”.
　まず、工作機械１００の全体構造について説明する。工作機械１００は、ベッド１１と、コラム２１と、サドル３１と、クロススライド４１と、工具主軸９１と、テーブル５１とを有する。 First, the overall structure of the machine tool 100 will be described. The machine tool 100 has a bed 11 , a column 21 , a saddle 31 , a cross slide 41 , a tool spindle 91 and a table 51 .
　ベッド１１は、コラム２１、サドル３１、クロススライド４１、工具主軸９１およびテーブル５１等を支持するためのベース部材であり、工場などの床面に設置されている。ベッド１１は、鋳鉄等の金属からなる。 The bed 11 is a base member for supporting the column 21, saddle 31, cross slide 41, tool spindle 91, table 51, etc., and is installed on the floor of a factory or the like. The bed 11 is made of metal such as cast iron.
　ベッド１１は、上面視した場合に、Ｚ軸方向に延びる長辺と、Ｘ軸方向に延びる短辺とを有する矩形形状を有する。Ｙ軸方向におけるベッド１１の全長は、Ｚ軸方向におけるベッド１１の全長よりも小さく、Ｘ軸方向におけるベッド１１の全長よりも小さい。 The bed 11 has a rectangular shape with long sides extending in the Z-axis direction and short sides extending in the X-axis direction when viewed from above. The total length of the bed 11 in the Y-axis direction is smaller than the total length of the bed 11 in the Z-axis direction and smaller than the total length of the bed 11 in the X-axis direction.
　ベッド１１は、第１周壁部１２と、第２周壁部１３とを有する。第１周壁部１２および第２周壁部１３は、上面視した場合のベッド１１の周縁に設けられている。第１周壁部１２および第２周壁部１３は、Ｘ軸方向におけるベッド１１の両端部に設けられている。第１周壁部１２は、－Ｘ軸方向におけるベッド１１の端部に設けられている。第２周壁部１３は、＋Ｘ軸方向におけるベッド１１の端部に設けられている。第１周壁部１２および第２周壁部１３は、上方に向けて立ち上がる壁形状をなしながらＺ軸方向に沿って延びている。 The bed 11 has a first peripheral wall portion 12 and a second peripheral wall portion 13 . The first peripheral wall portion 12 and the second peripheral wall portion 13 are provided on the periphery of the bed 11 when viewed from above. The first peripheral wall portion 12 and the second peripheral wall portion 13 are provided at both ends of the bed 11 in the X-axis direction. The first peripheral wall portion 12 is provided at the end of the bed 11 in the -X-axis direction. The second peripheral wall portion 13 is provided at the end of the bed 11 in the +X-axis direction. The first peripheral wall portion 12 and the second peripheral wall portion 13 extend along the Z-axis direction while forming a wall shape that rises upward.
　第１周壁部１２は、第１頂面１２ａを有する。第２周壁部１３は、第２頂面１３ａを有する。第１頂面１２ａおよび第２頂面１３ａは、Ｘ軸－Ｚ軸平面に平行な平面である。第１頂面１２ａおよび第２頂面１３ａは、上方を向いている。 The first peripheral wall portion 12 has a first top surface 12a. The second peripheral wall portion 13 has a second top surface 13a. The first top surface 12a and the second top surface 13a are planes parallel to the X-axis-Z-axis plane. The first top surface 12a and the second top surface 13a face upward.
　ベッド１１は、第１段差部１４と、第２段差部１５とをさらに有する。第１段差部１４は、第１周壁部１２から下方に向けて凹む段差をなしている。第２段差部１５は、第２周壁部１３から下方に向けて凹む段差をなしている。第１段差部１４は、Ｘ軸方向において、第１周壁部１２および第２段差部１５の間に設けられている。第２段差部１５は、Ｘ軸方向において、第１段差部１４および第２周壁部１３の間に設けられている。 The bed 11 further has a first stepped portion 14 and a second stepped portion 15 . The first step portion 14 forms a step recessed downward from the first peripheral wall portion 12 . The second step portion 15 forms a step recessed downward from the second peripheral wall portion 13 . The first stepped portion 14 is provided between the first peripheral wall portion 12 and the second stepped portion 15 in the X-axis direction. The second stepped portion 15 is provided between the first stepped portion 14 and the second peripheral wall portion 13 in the X-axis direction.
　第１段差部１４は、第３頂面１４ａを有する。第１頂面１２ａは、第３頂面１４ａよりも上方に配置されている。第１周壁部１２は、第３頂面１４ａから上方に向けて突出する凸形状をなしている。第２段差部１５は、第４頂面１５ａを有する。第２頂面１３ａは、第４頂面１５ａよりも上方に配置されている。第２周壁部１３は、第４頂面１５ａから上方に向けて突出する凸形状をなしている。 The first stepped portion 14 has a third top surface 14a. The first top surface 12a is arranged above the third top surface 14a. The first peripheral wall portion 12 has a convex shape protruding upward from the third top surface 14a. The second stepped portion 15 has a fourth top surface 15a. The second top surface 13a is arranged above the fourth top surface 15a. The second peripheral wall portion 13 has a convex shape protruding upward from the fourth top surface 15a.
　コラム２１は、ベッド１１上に立設されている。コラム２１は、ベッド１１の上面に載置されている。コラム２１は、全体として、ベッド１１から上方に向けて立ち上がる門型形状を有する。コラム２１は、ベッド１１に対して固定されている。コラム２１は、ボルトを用いて、ベッド１１に対して締結されている。コラム２１は、－Ｚ軸方向におけるベッド１１の端部に配置されている。 The column 21 is erected on the bed 11. Column 21 is placed on the upper surface of bed 11 . The column 21 as a whole has a gate shape rising upward from the bed 11 . Column 21 is fixed to bed 11 . Column 21 is fastened to bed 11 using bolts. The column 21 is arranged at the end of the bed 11 in the -Z-axis direction.
　サドル３１は、コラム２１により支持されている。サドル３１は、＋Ｚ軸方向を向くコラム２１の前面に設けられている。サドル３１は、全体として、ベッド１１から上方に向けて立ち上がる枠型形状を有する。サドル３１は、移動体である。サドル３１は、コラム２１に対してＸ軸方向に移動可能に設けられている。 The saddle 31 is supported by the column 21. The saddle 31 is provided on the front surface of the column 21 facing the +Z-axis direction. The saddle 31 as a whole has a frame shape rising upward from the bed 11 . The saddle 31 is a mobile body. The saddle 31 is provided movably in the X-axis direction with respect to the column 21 .
　なお、コラム２１およびサドル３１の構造、ならびに、サドル３１をＸ軸方向に移動させるための構造については、後で詳細に説明する。 The structures of the column 21 and the saddle 31, and the structure for moving the saddle 31 in the X-axis direction will be described later in detail.
　クロススライド４１は、サドル３１により支持されている。クロススライド４１は、＋Ｚ軸方向を向くサドル３１の前面に設けられている。クロススライド４１は、全体として、Ｘ軸－Ｙ軸平面に平行な板形状を有する。クロススライド４１は、サドル３１等に設けられた送り装置４２，４３およびガイド部４６，４７によって、サドル３１に対してＹ軸方向（上下方向）に移動可能に設けられている。 The cross slide 41 is supported by the saddle 31. The cross slide 41 is provided on the front surface of the saddle 31 facing the +Z-axis direction. The cross slide 41 as a whole has a plate shape parallel to the X-axis-Y-axis plane. The cross slide 41 is provided movably in the Y-axis direction (vertical direction) with respect to the saddle 31 by feed devices 42 and 43 and guide portions 46 and 47 provided on the saddle 31 and the like.
　工具主軸９１は、クロススライド４１により支持されている。工具主軸９１は、クロススライド４１に対して固定されている。工具主軸９１は、クロススライド４１を貫通し、クロススライド４１から＋Ｚ軸方向および－Ｚ軸方向に向けて突出している。工具主軸９１は、クロススライド４１を介して、コラム２１により支持されている。工具主軸９１は、サドル３１に対して、クロススライド４１とともにＹ軸方向（上下方向）に移動する。 The tool spindle 91 is supported by the cross slide 41. The tool spindle 91 is fixed with respect to the cross slide 41 . The tool spindle 91 passes through the cross slide 41 and protrudes from the cross slide 41 in the +Z-axis direction and the −Z-axis direction. A tool spindle 91 is supported by the column 21 via a cross slide 41 . The tool spindle 91 moves in the Y-axis direction (vertical direction) together with the cross slide 41 with respect to the saddle 31 .
　工具主軸９１は、Ｚ軸に平行な回転中心軸１１０を中心に、モータ駆動により回転可能に設けられている。工具主軸９１には、工作機械１００におけるワーク加工のための工具が保持される。工具主軸９１の回転に伴って、工具主軸９１に保持された工具が回転中心軸１１０を中心に回転する。 The tool spindle 91 is provided so as to be rotatable by motor drive around a rotation center axis 110 parallel to the Z-axis. The tool spindle 91 holds a tool for machining a workpiece in the machine tool 100 . As the tool spindle 91 rotates, the tool held by the tool spindle 91 rotates about the rotation center axis 110 .
　テーブル５１は、ベッド１１により支持されている。テーブル５１は、ベッド１１上に設けられている。テーブル５１は、コラム２１、サドル３１およびクロススライド４１から＋Ｚ軸方向に離れた位置に設けられている。テーブル５１は、ワークを保持するための装置である。テーブル５１は、Ｚ軸方向において工具主軸９１と対向する位置にワークを保持する。 The table 51 is supported by the bed 11. A table 51 is provided on the bed 11 . The table 51 is provided at a position separated from the column 21, the saddle 31 and the cross slide 41 in the +Z-axis direction. A table 51 is a device for holding a work. The table 51 holds the workpiece at a position facing the tool spindle 91 in the Z-axis direction.
　テーブル５１は、ワーク保持部６１と、テーブルベース７１とを有する。ワーク保持部６１は、Ｘ軸方向において、第１周壁部１２および第２周壁部１３の間に配置されている。ワーク保持部６１は、ワークを着脱可能に保持する。ワーク保持部６１には、パレットＰが装着されている。ワーク保持部６１には、パレットＰを、Ｙ軸方向に延びる回転中心軸１３０を中心に回転させるための回転機構部（不図示）と、パレットＰをクランプおよびアンクランプするためのクランプ機構部（不図示）とが内蔵されている。パレットＰには、たとえば、ワークが取り付けられるイケール等の治具が搭載される。 The table 51 has a work holding portion 61 and a table base 71 . The work holding portion 61 is arranged between the first peripheral wall portion 12 and the second peripheral wall portion 13 in the X-axis direction. The work holding portion 61 detachably holds a work. A pallet P is attached to the work holding portion 61 . The workpiece holding unit 61 includes a rotating mechanism (not shown) for rotating the pallet P around a rotation center axis 130 extending in the Y-axis direction, and a clamping mechanism (not shown) for clamping and unclamping the pallet P. (not shown) are built in. On the pallet P, for example, jigs such as tombstones to which works are attached are mounted.
　ワーク保持部６１は、テーブルベース７１により支持されている。テーブルベース７１は、ワーク保持部６１の下方に設けられている。テーブルベース７１は、上面視した場合に、Ｘ軸方向において、第３頂面１４ａおよび第４頂面１５ａの間に跨がって設けられている。 The work holding portion 61 is supported by a table base 71. The table base 71 is provided below the workpiece holder 61 . The table base 71 is provided across the third top surface 14a and the fourth top surface 15a in the X-axis direction when viewed from above.
　テーブル５１は、送り装置５２，５３およびガイド部５８，５９によって、ベッド１１に対してＺ軸方向に移動可能に設けられている。送り装置５２およびガイド部５８は、第３頂面１４ａ上に設けられている。送り装置５２およびガイド部５８は、第３頂面１４ａ上において、テーブルベース７１に接続されている。送り装置５３およびガイド部５９は、第４頂面１５ａ上に設けられている。送り装置５３およびガイド部５９は、第４頂面１５ａ上において、テーブルベース７１に接続されている。 The table 51 is provided movably in the Z-axis direction with respect to the bed 11 by feeding devices 52 and 53 and guide portions 58 and 59 . The feeding device 52 and the guide portion 58 are provided on the third top surface 14a. The feeding device 52 and the guide portion 58 are connected to the table base 71 on the third top surface 14a. The feeding device 53 and the guide portion 59 are provided on the fourth top surface 15a. The feeding device 53 and the guide portion 59 are connected to the table base 71 on the fourth top surface 15a.
　続いて、サドル３１およびコラム２１の構造と、サドル３１をＸ軸方向に移動させるための構造とについて、より具体的に説明する。図５は、図１中のサドルを示す斜視図である。図６は、図１中のサドルを示す上面図である。図７は、図１中のサドルを示す側面図である。 Next, the structures of the saddle 31 and the column 21 and the structure for moving the saddle 31 in the X-axis direction will be described in more detail. 5 is a perspective view showing the saddle in FIG. 1. FIG. 6 is a top view showing the saddle in FIG. 1. FIG. 7 is a side view showing the saddle in FIG. 1; FIG.
　図１から図７を参照して、サドル３１は、鋳鉄等の金属からなる。サドル３１は、フレーム部２１１を有する。フレーム部２１１は、工具主軸９１から、ワーク加工時の切削負荷を受ける剛体として設けられている。 　With reference to Figures 1 to 7, the saddle 31 is made of metal such as cast iron. The saddle 31 has a frame portion 211 . The frame portion 211 is provided as a rigid body that receives a cutting load from the tool spindle 91 during machining of the workpiece.
　フレーム部２１１は、枠形状を有する。フレーム部２１１は、工具主軸９１を取り囲むように設けられている。フレーム部２１１は、工具主軸９１における回転中心軸１１０の周りで周回する枠形状を有する。 The frame portion 211 has a frame shape. The frame portion 211 is provided so as to surround the tool spindle 91 . The frame portion 211 has a frame shape that revolves around the rotation center axis 110 of the tool spindle 91 .
　Ｙ軸方向におけるフレーム部２１１の全長は、Ｚ軸方向におけるフレーム部２１１の全長よりも大きく、Ｘ軸方向におけるフレーム部２１１の全長よりも大きい。Ｙ軸方向におけるフレーム部２１１の全長は、Ｙ軸方向におけるコラム２１の全長よりも大きい。Ｙ軸方向におけるフレーム部２１１の全長は、Ｙ軸方向におけるコラム２１の全長以下であってもよい。Ｘ軸方向におけるフレーム部２１１の全長は、Ｘ軸方向におけるコラム２１の全長よりも小さい。 The total length of the frame portion 211 in the Y-axis direction is greater than the total length of the frame portion 211 in the Z-axis direction and greater than the total length of the frame portion 211 in the X-axis direction. The total length of the frame portion 211 in the Y-axis direction is greater than the total length of the column 21 in the Y-axis direction. The total length of the frame portion 211 in the Y-axis direction may be equal to or less than the total length of the column 21 in the Y-axis direction. The total length of the frame portion 211 in the X-axis direction is smaller than the total length of the column 21 in the X-axis direction.
　Ｚ軸方向におけるフレーム部２１１の全長（最大厚み）は、Ｚ軸方向におけるコラム２１の全長（最大厚み）よりも小さくてもよいし、Ｚ軸方向におけるコラム２１の全長（最大厚み）以上であってもよい。 The total length (maximum thickness) of the frame portion 211 in the Z-axis direction may be smaller than the total length (maximum thickness) of the column 21 in the Z-axis direction, or greater than or equal to the total length (maximum thickness) of the column 21 in the Z-axis direction. may
　図５から図７に示されるように、フレーム部２１１は、第１側壁部２１２と、第２側壁部２１３と、上壁部２１４と、下壁部２１５とを有する。 As shown in FIGS. 5 to 7, the frame portion 211 has a first side wall portion 212, a second side wall portion 213, an upper wall portion 214, and a lower wall portion 215.
　第１側壁部２１２および第２側壁部２１３は、Ｘ軸方向において、互いに離れて設けられている。第１側壁部２１２および第２側壁部２１３は、Ｙ軸方向（上下方向）に延びている。上壁部２１４および下壁部２１５は、Ｘ軸方向に延びている。上壁部２１４および下壁部２１５は、Ｙ軸方向において、互いに離れて設けられている。－Ｘ軸方向における上壁部２１４の端部が、＋Ｙ軸方向における第１側壁部２１２の端部に接続され、＋Ｘ軸方向における上壁部２１４の端部が、＋Ｙ軸方向における第２側壁部２１３の端部に接続されている。－Ｘ軸方向における下壁部２１５の端部が、－Ｙ軸方向における第１側壁部２１２の端部に接続され、＋Ｘ軸方向における下壁部２１５の端部が、－Ｙ軸方向における第２側壁部２１３の端部に接続されている。 The first side wall portion 212 and the second side wall portion 213 are provided apart from each other in the X-axis direction. The first side wall portion 212 and the second side wall portion 213 extend in the Y-axis direction (vertical direction). The upper wall portion 214 and the lower wall portion 215 extend in the X-axis direction. The upper wall portion 214 and the lower wall portion 215 are provided apart from each other in the Y-axis direction. The end of the upper wall portion 214 in the −X-axis direction is connected to the end of the first side wall portion 212 in the +Y-axis direction, and the end of the upper wall portion 214 in the +X-axis direction is connected to the second side wall in the +Y-axis direction. It is connected to the end of the portion 213 . The end of the lower wall portion 215 in the −X-axis direction is connected to the end of the first side wall portion 212 in the −Y-axis direction, and the end of the lower wall portion 215 in the +X-axis direction is connected to the first side wall portion 212 in the −Y-axis direction. 2 is connected to the end of the side wall portion 213 .
　第１側壁部２１２、第２側壁部２１３、上壁部２１４および下壁部２１５は、互いに一体となって枠形状をなしている。第１側壁部２１２、第２側壁部２１３、上壁部２１４および下壁部２１５の内側には、開口部２１０が設けられている。開口部２１０は、Ｚ軸方向に延びている。開口部２１０には、工具主軸９１が挿入されている。第１側壁部２１２および第２側壁部２１３は、Ｘ軸方向に見た場合に、工具主軸９１の一部（後端部）と重なり合っている。上壁部２１４および下壁部２１５は、Ｙ軸方向に見た場合に、工具主軸９１の一部（後端部）と重なり合っている。 The first side wall portion 212, the second side wall portion 213, the upper wall portion 214 and the lower wall portion 215 are integrated with each other to form a frame shape. An opening 210 is provided inside each of the first sidewall 212 , the second sidewall 213 , the upper wall 214 and the lower wall 215 . The opening 210 extends in the Z-axis direction. A tool spindle 91 is inserted into the opening 210 . The first side wall portion 212 and the second side wall portion 213 overlap a portion (rear end portion) of the tool spindle 91 when viewed in the X-axis direction. The upper wall portion 214 and the lower wall portion 215 overlap a portion (rear end portion) of the tool spindle 91 when viewed in the Y-axis direction.
　フレーム部２１１は、仮想平面２０１を挟んで対称となる形状を有してもよい。仮想平面２０１は、Ｙ軸－Ｚ軸平面に平行で、かつ、工具主軸９１の回転中心軸１１０を含む平面である。第１側壁部２１２および第２側壁部２１３は、仮想平面２０１を挟んで、互いに対称となる形状を有してもよい。上壁部２１４は、仮想平面２０１を挟んで対称となる形状を有してもよい。下壁部２１５は、仮想平面２０１を挟んで対称となる形状を有してもよい。 The frame portion 211 may have a shape that is symmetrical with respect to the virtual plane 201 . A virtual plane 201 is a plane that is parallel to the Y-axis-Z-axis plane and includes the rotation center axis 110 of the tool spindle 91 . The first side wall portion 212 and the second side wall portion 213 may have shapes that are symmetrical to each other with the virtual plane 201 interposed therebetween. The upper wall portion 214 may have a symmetrical shape with respect to the virtual plane 201 . The lower wall portion 215 may have a symmetrical shape with respect to the virtual plane 201 .
　なお、ここでいう対称形状は、厳密な意味ではなく、フレーム部２１１は、センサもしくはスケール等の各種部品が取り付けられる座、または、各種部品を取り付けるための雌ネジもしくは孔などを除いた場合に、仮想平面２０１を挟んで対称となる形状を有すればよい。 It should be noted that the symmetrical shape referred to here does not have a strict meaning. , symmetrical with respect to the virtual plane 201 .
　フレーム部２１１は、上端部２２１と、下端部２２２とを有する。上端部２２１は、＋Ｙ軸方向におけるフレーム部２１１の先端部である。上端部２２１は、フレーム部２１１のうちで最も高い位置に配置されるフレーム部２１１の部位である。上端部２２１は、上壁部２１４の頂面からなる。下端部２２２は、－Ｙ軸方向におけるフレーム部２１１の先端部である。下端部２２２は、フレーム部２１１のうちで最も低い位置に配置されるフレーム部２１１の部位である。下端部２２２は、下壁部２１５の底面からなる。 The frame portion 211 has an upper end portion 221 and a lower end portion 222 . The upper end portion 221 is the tip portion of the frame portion 211 in the +Y-axis direction. The upper end portion 221 is a portion of the frame portion 211 that is arranged at the highest position in the frame portion 211 . The upper end portion 221 consists of the top surface of the upper wall portion 214 . The lower end portion 222 is the tip portion of the frame portion 211 in the -Y-axis direction. The lower end portion 222 is a portion of the frame portion 211 arranged at the lowest position in the frame portion 211 . The lower end portion 222 is formed from the bottom surface of the lower wall portion 215 .
　サドル３１は、中間リブ部２２０をさらに有する。中間リブ部２２０は、第１側壁部２１２および第２側壁部２１３の間において、Ｘ軸方向に延びている。 The saddle 31 further has an intermediate rib portion 220. Intermediate rib portion 220 extends in the X-axis direction between first side wall portion 212 and second side wall portion 213 .
　－Ｘ軸方向における中間リブ部２２０の端部は、－Ｚ軸方向における第１側壁部２１２の端部に接続され、＋Ｘ軸方向における中間リブ部２２０の端部は、－Ｚ軸方向における第２側壁部２１３の端部に接続されている。中間リブ部２２０は、上壁部２１４から－Ｙ軸方向に離れた位置であって、下壁部２１５から＋Ｙ軸方向に離れた位置に設けられている。中間リブ部２２０は、Ｙ軸方向において、フレーム部２１１の下端部２２２よりも上端部２２１寄りの位置に設けられている。 The end of the intermediate rib portion 220 in the −X-axis direction is connected to the end of the first side wall portion 212 in the −Z-axis direction, and the end of the intermediate rib portion 220 in the +X-axis direction is connected to the end of the first side wall portion 212 in the −Z-axis direction. 2 is connected to the end of the side wall portion 213 . The intermediate rib portion 220 is provided at a position away from the upper wall portion 214 in the −Y-axis direction and at a position away from the lower wall portion 215 in the +Y-axis direction. The intermediate rib portion 220 is provided at a position closer to the upper end portion 221 than the lower end portion 222 of the frame portion 211 in the Y-axis direction.
　サドル３１は、第１モータ取り付け部２１６と、第２モータ取り付け部２１７と、第１ナット取り付け部２１８と、第２ナット取り付け部２１９とをさらに有する。 The saddle 31 further has a first motor mounting portion 216 , a second motor mounting portion 217 , a first nut mounting portion 218 and a second nut mounting portion 219 .
　第１モータ取り付け部２１６は、第１側壁部２１２および上壁部２１４が交わる角部に設けられている。第２モータ取り付け部２１７は、第２側壁部２１３および上壁部２１４が交わる角部に設けられている。第１モータ取り付け部２１６および第２モータ取り付け部２１７は、フレーム部２１１から＋Ｚ軸方向に突出している。第１モータ取り付け部２１６および第２モータ取り付け部２１７は、全体として、Ｙ軸方向に延びる筒形状をなしている。第１モータ取り付け部２１６および第２モータ取り付け部２１７は、仮想平面２０１を挟んで対称に設けられている。 The first motor mounting portion 216 is provided at the corner where the first side wall portion 212 and the upper wall portion 214 intersect. The second motor mounting portion 217 is provided at a corner where the second side wall portion 213 and the upper wall portion 214 intersect. The first motor mounting portion 216 and the second motor mounting portion 217 protrude from the frame portion 211 in the +Z-axis direction. The first motor mounting portion 216 and the second motor mounting portion 217 as a whole have a tubular shape extending in the Y-axis direction. The first motor mounting portion 216 and the second motor mounting portion 217 are provided symmetrically with respect to the virtual plane 201 .
　第１ナット取り付け部２１８は、中間リブ部２２０から－Ｚ軸方向に突出している。第２ナット取り付け部２１９は、下壁部２１５から－Ｚ軸方向に突出している。第１ナット取り付け部２１８および第２ナット取り付け部２１９は、全体として、Ｘ軸方向に延び、－Ｚ軸方向を向いて部分的に開放された筒形状をなしている。 The first nut mounting portion 218 protrudes from the intermediate rib portion 220 in the -Z-axis direction. The second nut attachment portion 219 protrudes from the lower wall portion 215 in the −Z-axis direction. The first nut mounting portion 218 and the second nut mounting portion 219 as a whole form a cylindrical shape extending in the X-axis direction and partially open in the -Z-axis direction.
　図１から図７に示されるように、工作機械１００は、第１送り装置２２と、第２送り装置２３とをさらに有する。第１送り装置２２および第２送り装置２３は、コラム２１およびサドル３１に設けられている。第１送り装置２２および第２送り装置２３は、サドル３１に対して駆動力を付与することによって、サドル３１をＺ軸方向に移動させる。 As shown in FIGS. 1 to 7, the machine tool 100 further has a first feed device 22 and a second feed device 23. A first feeder 22 and a second feeder 23 are provided on the column 21 and the saddle 31 . The first feeding device 22 and the second feeding device 23 move the saddle 31 in the Z-axis direction by applying a driving force to the saddle 31 .
　第１送り装置２２は、サーボモータ２４１と、ネジ軸２４２と、ナット２４３とを有する。第２送り装置２３は、サーボモータ２４６と、ネジ軸２４７と、ナット（不図示）とを有する。 The first feeding device 22 has a servomotor 241 , a screw shaft 242 and a nut 243 . The second feeding device 23 has a servomotor 246, a screw shaft 247, and a nut (not shown).
　図２に示されるように、ネジ軸２４２は、Ｘ軸方向に延びている。ネジ軸２４２は、Ｘ軸方向において互いに離れて配置された複数の軸受けによって、回転可能に支持されている。ナット２４３は、複数のボールを介して、ネジ軸２４２に嵌め合わされている。ナット２４３は、サドル３１に固定されている。ナット２４３は、第１ナット取り付け部２１８に取り付けられている。ネジ軸２４２およびナット２４３は、ボールネジを構成している。サーボモータ２４１の出力軸は、ネジ軸２４２に連結されている。サーボモータ２４１からの回転は、ネジ軸２４２に入力される。 As shown in FIG. 2, the screw shaft 242 extends in the X-axis direction. The screw shaft 242 is rotatably supported by a plurality of bearings arranged apart from each other in the X-axis direction. The nut 243 is fitted onto the screw shaft 242 via a plurality of balls. A nut 243 is fixed to the saddle 31 . The nut 243 is attached to the first nut attachment portion 218 . The screw shaft 242 and the nut 243 constitute a ball screw. The output shaft of the servomotor 241 is connected to the screw shaft 242 . Rotation from the servomotor 241 is input to the screw shaft 242 .
　ネジ軸２４７は、Ｘ軸方向に延びている。ネジ軸２４７は、Ｘ軸方向において互いに離れて配置された複数の軸受けによって、回転可能に支持されている。ナット（不図示）は、複数のボールを介して、ネジ軸２４７に嵌め合わされている。ナット（不図示）は、サドル３１に固定されている。ナット（不図示）は、第２ナット取り付け部２１９に取り付けられている。ネジ軸２４７およびナット（不図示）は、ボールネジを構成している。サーボモータ２４６の出力軸は、ネジ軸２４７に連結されている。サーボモータ２４６からの回転は、ネジ軸２４７に入力される。 The screw shaft 247 extends in the X-axis direction. The screw shaft 247 is rotatably supported by a plurality of bearings spaced apart from each other in the X-axis direction. A nut (not shown) is fitted to the screw shaft 247 via a plurality of balls. A nut (not shown) is fixed to the saddle 31 . A nut (not shown) is attached to the second nut attachment portion 219 . The screw shaft 247 and a nut (not shown) constitute a ball screw. An output shaft of the servomotor 246 is connected to the screw shaft 247 . Rotation from the servomotor 246 is input to the screw shaft 247 .
　図３に示されるように、第１送り装置２２は、第２送り装置２３よりも上方に設けられている。第１送り装置２２は、Ｙ軸方向において、フレーム部２１１の下端部２２２よりも上端部２２１寄りの位置に設けられている。第２送り装置２３は、Ｙ軸方向において、フレーム部２１１の上端部２２１よりも下端部２２２寄りの位置に設けられている。第１送り装置２２は、第２送り装置２３から－Ｚ軸方向にずれた位置に設けられている。 As shown in FIG. 3 , the first feeding device 22 is provided above the second feeding device 23 . The first feeding device 22 is provided at a position closer to the upper end portion 221 than the lower end portion 222 of the frame portion 211 in the Y-axis direction. The second feeding device 23 is provided at a position closer to the lower end portion 222 than the upper end portion 221 of the frame portion 211 in the Y-axis direction. The first feeding device 22 is provided at a position displaced from the second feeding device 23 in the -Z-axis direction.
　図８は、図３中の２点鎖線ＶＩＩＩで囲まれた範囲を拡大して示す側面図である。図９は、図３中の２点鎖線ＩＸで囲まれた範囲を拡大して示す側面図である。 FIG. 8 is a side view showing an enlarged area surrounded by a two-dot chain line VIII in FIG. 9 is a side view showing an enlarged area surrounded by a two-dot chain line IX in FIG. 3. FIG.
　図８および図９を参照して、サドル３１は、第１ガイド取り付け面２３１と、第２ガイド取り付け面２３２とを有する。第１ガイド取り付け面２３１および第２ガイド取り付け面２３２は、Ｘ軸－Ｙ軸平面に平行な平面からなる。第１ガイド取り付け面２３１および第２ガイド取り付け面２３２は、－Ｚ軸方向を向いている。 With reference to FIGS. 8 and 9, the saddle 31 has a first guide mounting surface 231 and a second guide mounting surface 232. As shown in FIG. The first guide mounting surface 231 and the second guide mounting surface 232 are planes parallel to the X-Y axis plane. The first guide mounting surface 231 and the second guide mounting surface 232 face the -Z-axis direction.
　コラム２１は、第３ガイド取り付け面２６１と、第４ガイド取り付け面２６２とをさらに有する。第３ガイド取り付け面２６１および第４ガイド取り付け面２６２は、Ｘ軸－Ｙ軸平面に平行な平面からなる。第３ガイド取り付け面２６１および第４ガイド取り付け面２６２は、＋Ｚ軸方向を向いている。 The column 21 further has a third guide mounting surface 261 and a fourth guide mounting surface 262. The third guide mounting surface 261 and the fourth guide mounting surface 262 are planes parallel to the X-Y axis plane. The third guide mounting surface 261 and the fourth guide mounting surface 262 face the +Z-axis direction.
　第３ガイド取り付け面２６１は、Ｚ軸方向において、第１ガイド取り付け面２３１と対向している。第４ガイド取り付け面２６２は、Ｚ軸方向において、第２ガイド取り付け面２３２と対向している。 The third guide mounting surface 261 faces the first guide mounting surface 231 in the Z-axis direction. The fourth guide mounting surface 262 faces the second guide mounting surface 232 in the Z-axis direction.
　図１から図９を参照して、工作機械１００は、第１ガイド部２６と、第２ガイド部２７とをさらに有する。第１ガイド部２６および第２ガイド部２７は、コラム２１およびサドル３１に設けられている。第１ガイド部２６および第２ガイド部２７は、サドル３１をＸ軸方向に案内する。 With reference to FIGS. 1 to 9, the machine tool 100 further has a first guide portion 26 and a second guide portion 27. As shown in FIG. The first guide portion 26 and the second guide portion 27 are provided on the column 21 and the saddle 31 . The first guide portion 26 and the second guide portion 27 guide the saddle 31 in the X-axis direction.
　第１ガイド部２６は、第１ガイド取り付け面２３１および第３ガイド取り付け面２６１に取り付けられている。 The first guide portion 26 is attached to the first guide attachment surface 231 and the third guide attachment surface 261 .
　第１ガイド部２６は、レール２５１と、スライダー２５２およびスライダー２５３とを有する。レール２５１は、Ｘ軸方向に延びている。レール２５１は、ボルトを用いて、第３ガイド取り付け面２６１に締結されている。スライダー２５２およびスライダー２５３は、複数のボールを介して、レール２５１に嵌め合わされている。スライダー２５２およびスライダー２５３は、レール２５１に案内されることによってＸ軸方向にスライド可能である。スライダー２５２およびスライダー２５３は、Ｘ軸方向において、互いに離れて設けられている。スライダー２５２およびスライダー２５３は、ボルトを用いて、第１ガイド取り付け面２３１に締結されている。レール２５１と、スライダー２５２およびスライダー２５３とは、直動案内機構であるリニアガイドを構成している。 The first guide portion 26 has a rail 251 and sliders 252 and 253 . The rail 251 extends in the X-axis direction. The rail 251 is fastened to the third guide mounting surface 261 using bolts. The sliders 252 and 253 are fitted to the rail 251 via a plurality of balls. The sliders 252 and 253 are slidable in the X-axis direction by being guided by the rails 251 . The sliders 252 and 253 are provided apart from each other in the X-axis direction. The sliders 252 and 253 are fastened to the first guide mounting surface 231 using bolts. The rail 251 and the sliders 252 and 253 constitute a linear guide, which is a linear guide mechanism.
　第２ガイド部２７は、第２ガイド取り付け面２３２および第４ガイド取り付け面２６２に取り付けられている。 The second guide portion 27 is attached to the second guide attachment surface 232 and the fourth guide attachment surface 262 .
　第２ガイド部２７は、レール２５６と、スライダー２５７およびスライダー２５８とを有する。レール２５６は、Ｘ軸方向に延びている。レール２５６は、ボルトを用いて、第４ガイド取り付け面２６２に締結されている。スライダー２５７およびスライダー２５８は、複数のボールを介して、レール２５６に嵌め合わされている。スライダー２５７およびスライダー２５８は、レール２５６に案内されることによってＸ軸方向にスライド可能である。スライダー２５７およびスライダー２５８は、Ｘ軸方向において、互いに離れて設けられている。スライダー２５７およびスライダー２５８は、ボルトを用いて、第２ガイド取り付け面２３２に締結されている。レール２５６と、スライダー２５７およびスライダー２５８とは、直動案内機構であるリニアガイドを構成している。 The second guide portion 27 has a rail 256 and sliders 257 and 258 . Rail 256 extends in the X-axis direction. The rail 256 is fastened to the fourth guide mounting surface 262 using bolts. The sliders 257 and 258 are fitted to the rail 256 via a plurality of balls. The sliders 257 and 258 are slidable in the X-axis direction by being guided by the rails 256 . The sliders 257 and 258 are provided apart from each other in the X-axis direction. The sliders 257 and 258 are fastened to the second guide mounting surface 232 using bolts. The rail 256 and the sliders 257 and 258 constitute a linear guide, which is a linear guide mechanism.
　第１ガイド部２６は、第２ガイド部２７よりも上方に設けられている。第１ガイド部２６は、Ｙ軸方向において、フレーム部２１１の下端部２２２よりも上端部２２１寄りの位置に設けられている。第２ガイド部２７は、Ｙ軸方向において、フレーム部２１１の上端部２２１よりも下端部２２２寄りの位置に設けられている。第１ガイド部２６は、第２ガイド部２７から－Ｚ軸方向にずれた位置に設けられている。 The first guide portion 26 is provided above the second guide portion 27 . The first guide portion 26 is provided at a position closer to the upper end portion 221 than the lower end portion 222 of the frame portion 211 in the Y-axis direction. The second guide portion 27 is provided at a position closer to the lower end portion 222 than the upper end portion 221 of the frame portion 211 in the Y-axis direction. The first guide portion 26 is provided at a position displaced from the second guide portion 27 in the −Z-axis direction.
　コラム２１に対する第１ガイド部２６および第２ガイド部２７の組み付け作業時、作業者は、コラム２１を、－Ｚ軸方向を向くコラム２１の後面が床面上に横たわる姿勢として、第３ガイド取り付け面２６１にレール２５１を取り付け、第４ガイド取り付け面２６２にレール２５６を取り付ける。 During the work of assembling the first guide portion 26 and the second guide portion 27 to the column 21, the operator places the column 21 in a position in which the rear surface of the column 21 facing the -Z axis direction lies on the floor, and installs the third guide. A rail 251 is attached to the surface 261 and a rail 256 is attached to the fourth guide attachment surface 262 .
　本実施の形態では、第３ガイド取り付け面２６１および第４ガイド取り付け面２６２が、それぞれ、第１ガイド取り付け面２３１および第２ガイド取り付け面２３２とＺ軸方向において対向するため、上記のコラム２１に対する第１ガイド部２６および第２ガイド部２７の組み付け作業時に、第３ガイド取り付け面２６１および第４ガイド取り付け面２６２が上方を向く。これにより、コラム２１に対する第１ガイド部２６および第２ガイド部２７の組み付け作業を容易に行なうことができる。 In this embodiment, the third guide mounting surface 261 and the fourth guide mounting surface 262 face the first guide mounting surface 231 and the second guide mounting surface 232, respectively, in the Z-axis direction. During the assembly work of the first guide portion 26 and the second guide portion 27, the third guide mounting surface 261 and the fourth guide mounting surface 262 face upward. This facilitates the work of assembling the first guide portion 26 and the second guide portion 27 to the column 21 .
　図５から図７に示されるように、コラム２１は、第５ガイド取り付け面２２６と、第６ガイド取り付け面２２７とをさらに有する。第５ガイド取り付け面２２６および第６ガイド取り付け面２２７は、Ｘ軸－Ｙ軸平面に平行な平面からなる。第５ガイド取り付け面２２６および第６ガイド取り付け面２２７は、＋Ｚ軸方向を向いている。第５ガイド取り付け面２２６および第６ガイド取り付け面２２７は、＋Ｚ軸方向におけるフレーム部２１１の端部に設けられている。 The column 21 further has a fifth guide mounting surface 226 and a sixth guide mounting surface 227, as shown in FIGS. The fifth guide mounting surface 226 and the sixth guide mounting surface 227 are planes parallel to the X-Y axis plane. The fifth guide mounting surface 226 and the sixth guide mounting surface 227 face the +Z-axis direction. The fifth guide mounting surface 226 and the sixth guide mounting surface 227 are provided at the end of the frame portion 211 in the +Z-axis direction.
　第５ガイド取り付け面２２６および第６ガイド取り付け面２２７は、Ｘ軸方向において、互いに離れて設けられている。第５ガイド取り付け面２２６および第６ガイド取り付け面２２７は、それぞれ、第１側壁部２１２および第２側壁部２１３に設けられている。第５ガイド取り付け面２２６および第６ガイド取り付け面２２７は、Ｙ軸方向に沿って帯状に延びている。 The fifth guide mounting surface 226 and the sixth guide mounting surface 227 are provided apart from each other in the X-axis direction. A fifth guide mounting surface 226 and a sixth guide mounting surface 227 are provided on the first side wall portion 212 and the second side wall portion 213, respectively. The fifth guide mounting surface 226 and the sixth guide mounting surface 227 extend in a belt shape along the Y-axis direction.
　第５ガイド取り付け面２２６には、クロススライド４１をＹ軸方向に案内するガイド部４６のレールが取り付けられている。第６ガイド取り付け面２２７には、クロススライド４１をＹ軸方向に案内するガイド部４７のレールが取り付けられている。 A rail of the guide portion 46 that guides the cross slide 41 in the Y-axis direction is attached to the fifth guide attachment surface 226 . A rail of the guide portion 47 that guides the cross slide 41 in the Y-axis direction is attached to the sixth guide attachment surface 227 .
　図７に示されるように、Ｚ軸方向におけるフレーム部２１１の厚みＢは、Ｙ軸方向に沿って変化する。Ｚ軸方向における第１側壁部２１２および第２側壁部２１３の各厚みＢは、Ｙ軸方向に沿って変化する。 As shown in FIG. 7, the thickness B of the frame portion 211 in the Z-axis direction changes along the Y-axis direction. Each thickness B of the first side wall portion 212 and the second side wall portion 213 in the Z-axis direction varies along the Y-axis direction.
　Ｚ軸方向におけるフレーム部２１１の厚みＢは、フレーム部２１１の上端部２２１および下端部２２２の間における一部の区間で変化してもよいし、フレーム部２１１の上端部２２１および下端部２２２の間における全区間で変化してもよい。すなわち、フレーム部２１１は、フレーム部２１１の上端部２２１および下端部２２２の間に、Ｚ軸方向におけるフレーム部２１１の厚みＢがＹ軸方向に沿って変化する少なくとも一部の区間を有する。 The thickness B of the frame portion 211 in the Z-axis direction may change in a partial section between the upper end portion 221 and the lower end portion 222 of the frame portion 211, or may vary between the upper end portion 221 and the lower end portion 222 of the frame portion 211. may vary over the entire interval in between. That is, the frame portion 211 has at least a partial section between the upper end portion 221 and the lower end portion 222 of the frame portion 211 in which the thickness B of the frame portion 211 in the Z-axis direction changes along the Y-axis direction.
　Ｚ軸方向におけるフレーム部２１１の厚みＢは、フレーム部２１１の下端部２２２よりもフレーム部２１１の上端部２２１寄りの第１位置Ｐａで最大（最大厚みＢｍａｘ）となる。Ｙ軸方向における上端部２２１および第１位置Ｐａの間の長さは、Ｙ軸方向における第１位置Ｐａおよび下端部２２２の間の長さよりも小さい。第１位置Ｐａは、フレーム部２１１が最大厚みＢｍａｘを有する、Ｙ軸方向における所定範囲に対応している。 The thickness B of the frame portion 211 in the Z-axis direction becomes maximum (maximum thickness Bmax) at a first position Pa closer to the upper end portion 221 of the frame portion 211 than the lower end portion 222 of the frame portion 211 . The length between upper end portion 221 and first position Pa in the Y-axis direction is smaller than the length between first position Pa and lower end portion 222 in the Y-axis direction. The first position Pa corresponds to a predetermined range in the Y-axis direction where the frame portion 211 has the maximum thickness Bmax.
　フレーム部２１１は、Ｙ軸方向における上端部２２１および下端部２２２の間において、長さ（全長）Ｈを有する。フレーム部２１１は、Ｙ軸方向における上端部２２１および中間位置Ｐｈの間において、長さＨ／２を有し、Ｙ軸方向における中間位置Ｐｈおよび下端部２２２の間において、長さＨ／２を有する。中間位置Ｐｈは、Ｙ軸方向において、上端部２２１および下端部２２２の間の中心に位置している。 The frame portion 211 has a length (total length) H between the upper end portion 221 and the lower end portion 222 in the Y-axis direction. The frame portion 211 has a length H/2 between the upper end portion 221 and the intermediate position Ph in the Y-axis direction, and a length H/2 between the intermediate position Ph and the lower end portion 222 in the Y-axis direction. have. The intermediate position Ph is located at the center between the upper end portion 221 and the lower end portion 222 in the Y-axis direction.
　第１位置Ｐａは、中間位置Ｐａよりも上方に位置している。第１位置Ｐａは、Ｙ軸方向において、上端部２２１よりも中間位置Ｐｈ寄りに位置している。第１位置Ｐａは、Ｙ軸方向において、中間位置Ｐｈよりも上端部２２１寄りに位置してもよいし、上端部２２１および中間位置Ｐｈの間の中心に位置してもよい。 The first position Pa is located above the intermediate position Pa. The first position Pa is positioned closer to the intermediate position Ph than the upper end portion 221 in the Y-axis direction. The first position Pa may be positioned closer to the upper end portion 221 than the intermediate position Ph, or may be positioned at the center between the upper end portion 221 and the intermediate position Ph in the Y-axis direction.
　図３および図７に示されるように、第１ガイド部２６（レール２５１，スライダー２５２，スライダー２５３）は、Ｙ軸方向において第１位置Ｐａに配置されている。第１ガイド取り付け面２３１は、Ｙ軸方向において第１位置Ｐａに配置されている。Ｙ軸方向におけるレール２５１の中心位置は、第１位置Ｐａに位置している。なお、Ｚ軸方向におけるフレーム部２１１の最大厚みＢｍａｘは、近似的に、第１ガイド取り付け面２３１と、第５ガイド取り付け面２２６および第６ガイド取り付け面２２７との間の長さに対応している。 As shown in FIGS. 3 and 7, the first guide portion 26 (rail 251, slider 252, slider 253) is arranged at a first position Pa in the Y-axis direction. The first guide mounting surface 231 is arranged at the first position Pa in the Y-axis direction. The center position of the rail 251 in the Y-axis direction is located at the first position Pa. Note that the maximum thickness Bmax of the frame portion 211 in the Z-axis direction approximately corresponds to the length between the first guide mounting surface 231 and the fifth and sixth guide mounting surfaces 226 and 227. there is
　第２ガイド部２７（レール２５６，スライダー２５７，スライダー２５８）は、Ｙ軸方向において第２位置Ｐｂに配置されている。第２ガイド取り付け面２３２は、Ｙ軸方向において第２位置Ｐｂに配置されている。第２位置Ｐｂは、Ｙ軸方向におけるレール２５６の中心位置に対応している。 The second guide portion 27 (rail 256, slider 257, slider 258) is arranged at a second position Pb in the Y-axis direction. The second guide mounting surface 232 is arranged at the second position Pb in the Y-axis direction. The second position Pb corresponds to the center position of the rail 256 in the Y-axis direction.
　第２位置Ｐｂは、第１位置Ｐａよりも下方に位置している。第２位置Ｐｂは、Ｙ軸方向において、フレーム部２１１の上端部２２１よりも下端部２２２寄りに位置している。第２位置Ｐｂは、Ｙ軸方向において、中間位置Ｐｈよりも下端部２２２寄りに位置している。第２位置Ｐｂは、Ｙ軸方向において、下端部２２２よりも中間位置Ｐｈ寄りに位置してもよいし、中間位置Ｐｈおよび下端部２２２の間の中心に位置してもよい。 The second position Pb is located below the first position Pa. The second position Pb is positioned closer to the lower end portion 222 than the upper end portion 221 of the frame portion 211 in the Y-axis direction. The second position Pb is positioned closer to the lower end portion 222 than the intermediate position Ph in the Y-axis direction. The second position Pb may be located closer to the intermediate position Ph than the lower end portion 222 in the Y-axis direction, or may be located at the center between the intermediate position Ph and the lower end portion 222 .
　フレーム部２１１は、第２位置ＰｂでＺ軸方向における厚みＢｂを有する。なお、Ｚ軸方向におけるフレーム部２１１の厚みＢｂは、近似的に、第２ガイド取り付け面２３２と、第５ガイド取り付け面２２６および第６ガイド取り付け面２２７との間の長さである。Ｚ軸方向におけるフレーム部２１１の最大厚みＢｍａｘは、Ｚ軸方向におけるフレーム部２１１の厚みＢｂの２倍以上であってもよいし、３倍以上であってもよい（Ｂｍａｘ≧２Ｂｂ，Ｂｍａｘ≧３Ｂｂ）。 The frame portion 211 has a thickness Bb in the Z-axis direction at the second position Pb. Note that the thickness Bb of the frame portion 211 in the Z-axis direction is approximately the length between the second guide mounting surface 232 and the fifth and sixth guide mounting surfaces 226 and 227 . The maximum thickness Bmax of the frame portion 211 in the Z-axis direction may be twice or more the thickness Bb of the frame portion 211 in the Z-axis direction, or may be three times or more (Bmax≧2Bb, Bmax≧3Bb ).
　第２位置ＰｂでのＺ軸方向におけるコラム２１の厚みＣｂは、第１位置ＰａでのＺ軸方向におけるコラム２１の厚みＣａよりも大きい（Ｃｂ＞Ｃａ）。Ｚ軸方向におけるコラム２１の厚みＣｂは、Ｚ軸方向におけるコラム２１の厚みＣａの１．５倍以上であってもよいし、２倍以上であってもよい（Ｃｂ≧１．５Ｃａ，Ｃｂ≧２Ｃａ）。 The thickness Cb of the column 21 in the Z-axis direction at the second position Pb is greater than the thickness Ca of the column 21 in the Z-axis direction at the first position Pa (Cb>Ca). The thickness Cb of the column 21 in the Z-axis direction may be 1.5 times or more the thickness Ca of the column 21 in the Z-axis direction, or may be 2 times or more (Cb≧1.5Ca, Cb≧ 2 Ca).
　Ｚ軸方向におけるフレーム部２１１の最大厚みＢｍａｘと、Ｚ軸方向におけるコラム２１の厚みＣａとの和は、Ｚ軸方向におけるフレーム部２１１の厚みＢｂと、Ｚ軸方向におけるコラム２１の厚みＣｂとの和と等しくてもよい（Ｂｍａｘ＋Ｃａ＝Ｂｂ＋Ｃｂ）。 The sum of the maximum thickness Bmax of the frame portion 211 in the Z-axis direction and the thickness Ca of the column 21 in the Z-axis direction is the sum of the thickness Bb of the frame portion 211 in the Z-axis direction and the thickness Cb of the column 21 in the Z-axis direction. may be equal to the sum (Bmax+Ca=Bb+Cb).
　第１送り装置２２は、Ｙ軸方向において、第２ガイド部２７よりも第１ガイド部２６寄りの第３位置Ｐｃに配置されている。第２送り装置２３は、Ｙ軸方向において、第１ガイド部２６よりも第２ガイド部２７寄りの第４位置Ｐｄに配置されている。第３位置Ｐｃは、ネジ軸２４２に回転中心軸の位置に対応し、第４位置Ｐｄは、ネジ軸２４７の回転中心軸の位置に対応している。 The first feeding device 22 is arranged at a third position Pc closer to the first guide portion 26 than the second guide portion 27 in the Y-axis direction. The second feeding device 23 is arranged at a fourth position Pd closer to the second guide portion 27 than the first guide portion 26 in the Y-axis direction. The third position Pc corresponds to the position of the rotation center axis of the screw shaft 242 , and the fourth position Pd corresponds to the position of the rotation center axis of the screw shaft 247 .
　第３位置Ｐｃは、Ｙ軸方向において、フレーム部２１１の下端部２２２よりも上端部２２１寄りに位置している。第３位置Ｐｃは、第１位置Ｐａよりも上方に位置している。第１送り装置２２は、Ｙ軸方向（上下方向）において、第１ガイド部２６と並んで設けられている。第４位置Ｐｄは、Ｙ軸方向において、フレーム部２１１の上端部２２１よりも下端部２２２寄りに位置している。第４位置Ｐｄは、第２位置Ｐｂよりも上方に位置している。第２送り装置２３は、Ｙ軸方向（上下方向）において、第２ガイド部２７と並んで設けられている。 The third position Pc is positioned closer to the upper end portion 221 than the lower end portion 222 of the frame portion 211 in the Y-axis direction. The third position Pc is located above the first position Pa. The first feeding device 22 is provided side by side with the first guide portion 26 in the Y-axis direction (vertical direction). The fourth position Pd is positioned closer to the lower end portion 222 than the upper end portion 221 of the frame portion 211 in the Y-axis direction. The fourth position Pd is located above the second position Pb. The second feeding device 23 is provided side by side with the second guide portion 27 in the Y-axis direction (vertical direction).
　このような構成によれば、第１送り装置２２が、Ｙ軸方向において、第２ガイド部２７よりも第１ガイド部２６寄りの第３位置Ｐｃに配置され、第２送り装置２３が、Ｙ軸方向において、第１ガイド部２６よりも第２ガイド部２７寄りの第４位置Ｐｄに配置されているため、第１ガイド部２６の側の駆動力と、第２ガイド部２７の側の駆動力とに差が生じることを抑制できる。これにより、サドル３１をＸ軸方向においてより安定して移動させることができる。 According to such a configuration, the first feeding device 22 is arranged at the third position Pc closer to the first guide portion 26 than the second guide portion 27 in the Y-axis direction, and the second feeding device 23 is arranged in the Y-axis direction. Since it is arranged at the fourth position Pd closer to the second guide portion 27 than the first guide portion 26 in the axial direction, the driving force on the first guide portion 26 side and the driving force on the second guide portion 27 side It is possible to suppress the occurrence of a difference in force. Thereby, the saddle 31 can be moved more stably in the X-axis direction.
　なお、第１送り装置２２および第１ガイド部２６は、Ｙ軸方向（上下方向）において、互いに入れ替わって設けられてもよいし、第２送り装置２３および第２ガイド部２７は、Ｙ軸方向（上下方向）において、互いに入れ替わって設けられてもよい。 Note that the first feeding device 22 and the first guide portion 26 may be provided alternately in the Y-axis direction (vertical direction), and the second feeding device 23 and the second guide portion 27 may be provided in the Y-axis direction. (in the vertical direction), they may be provided alternately with each other.
　図７に示されるように、フレーム部２１１は、第１漸減部２３６と、第２漸減部２３７とを有する。Ｚ軸方向におけるフレーム部２１１の厚みＢは、第１漸減部２３６において、第１位置Ｐａから上端部２２１に向かうに従って減少する。第１漸減部２３６は、Ｙ軸方向において、第１位置Ｐａおよび上端部２２１の間に設けられている。Ｚ軸方向におけるフレーム部２１１の厚みＢは、第２漸減部２３７において、第１位置Ｐａから下端部２２２に向かうに従って減少する。第２漸減部２３７は、Ｙ軸方向において、第１位置Ｐａおよび第４位置Ｐｄの間に設けられている。 As shown in FIG. 7, the frame portion 211 has a first tapered portion 236 and a second tapered portion 237 . A thickness B of the frame portion 211 in the Z-axis direction decreases from the first position Pa toward the upper end portion 221 at the first gradually decreasing portion 236 . The first gradually decreasing portion 236 is provided between the first position Pa and the upper end portion 221 in the Y-axis direction. A thickness B of the frame portion 211 in the Z-axis direction decreases from the first position Pa toward the lower end portion 222 at the second gradually decreasing portion 237 . The second gradually decreasing portion 237 is provided between the first position Pa and the fourth position Pd in the Y-axis direction.
　フレーム部２１１は、Ｘ軸方向に見た場合に、全体として、＋Ｚ軸方向における端部においてＹ軸方向に延びる底辺と、底辺の上端から、－Ｚ軸方向、かつ、－Ｙ軸方向に延びる第１斜辺と、底辺の下端から、－Ｚ軸方向、かつ、＋Ｙ軸方向に延び、第１位置Ｐａにおいて第１斜辺と交わる第２斜辺とを有する三角形状を有する。 When viewed in the X-axis direction, the frame portion 211 as a whole has a base extending in the Y-axis direction at the end in the +Z-axis direction and extending in the −Z-axis direction and the −Y-axis direction from the upper end of the base. It has a triangular shape having a first oblique side and a second oblique side extending in the −Z-axis direction and the +Y-axis direction from the lower end of the base and intersecting the first oblique side at a first position Pa.
　図３に示されるように、コラム２１は、Ｘ軸方向に見た場合に、全体として、－Ｚ軸方向における端部においてＹ軸方向に延びる第１辺と、第１辺の下端から、＋Ｚ軸方向に延び、第１辺よりも小さい長さを有する第２辺と、第１辺の上端から、＋Ｚ軸方向、かつ、－Ｙ軸方向に延び、第２辺と交わる斜辺とを有する三角形状を有する。 As shown in FIG. 3, when viewed in the X-axis direction, the column 21 as a whole has a first side extending in the Y-axis direction at the end in the -Z-axis direction and a +Z-axis from the lower end of the first side. A triangle having a second side that extends in the axial direction and has a length smaller than that of the first side, and an oblique side that extends in the +Z-axis direction and the -Y-axis direction from the upper end of the first side and intersects with the second side. have a shape.
　図１から図７に示されるように、Ｚ軸方向におけるフレーム部２１１の厚みＢがＹ軸方向に沿って変化するため、フレーム部２１１の厚みＢをＹ軸方向における全域に渡って大きく確保する場合と比較して、サドル３１の重量を低減することができる。これにより、Ｘ軸方向に移動するサドル３１の慣性モーメントを小さくして、ワーク加工時に生じる振動を抑制することができる。 As shown in FIGS. 1 to 7, the thickness B of the frame portion 211 in the Z-axis direction varies along the Y-axis direction. The weight of the saddle 31 can be reduced as compared with the case. As a result, the moment of inertia of the saddle 31 moving in the X-axis direction can be reduced to suppress vibrations that occur during machining of the workpiece.
　また、コラム２１の下端部は、ベッド１１により支持されるため、そのコラム２１によって支持されるサドル３１は、フレーム部２１１の下端部２２２よりも上端部２２１寄りの位置で振動し易い。これに対して、Ｚ軸方向におけるフレーム部２１１の厚みＢをフレーム部２１１の下端部２２２よりも上端部２２１寄りの第１位置Ｐａで最大とすることによって、第１位置Ｐａにおけるサドル３１の剛性を高めることができる。これにより、ワークの切削負荷が工具主軸９１を通じてサドル３１に伝わった場合であっても、サドル３１の振動を効果的に抑制することができる。 Also, since the lower end of the column 21 is supported by the bed 11 , the saddle 31 supported by the column 21 tends to vibrate at a position closer to the upper end 221 than the lower end 222 of the frame portion 211 . On the other hand, by maximizing the thickness B of the frame portion 211 in the Z-axis direction at the first position Pa closer to the upper end portion 221 than the lower end portion 222 of the frame portion 211, the rigidity of the saddle 31 at the first position Pa can increase As a result, even if the cutting load of the workpiece is transmitted to the saddle 31 through the tool spindle 91, the vibration of the saddle 31 can be effectively suppressed.
　また、第１ガイド部２６は、Ｚ軸方向におけるフレーム部２１１の厚みＢが最大となる第１位置Ｐａに配置されている。このような構成により、サドル３１が第１位置Ｐａにおいて第１ガイド部２６により支持されるため、サドル３１の振動をさらに効果的に抑制できる。 Also, the first guide portion 26 is arranged at the first position Pa where the thickness B of the frame portion 211 in the Z-axis direction is maximized. With such a configuration, the saddle 31 is supported by the first guide portion 26 at the first position Pa, so vibration of the saddle 31 can be suppressed more effectively.
　また、第１位置Ｐａよりも下方の第２位置ＰｂでのＺ軸方向におけるコラム２１の厚みＣｂは、第１位置ＰａでのＺ軸方向におけるコラム２１の厚みＣａよりも大きい。このような構成により、ベッド１１により支持される下端部側のコラム２１の厚みを十分に確保する。これにより、コラム２１がベッド１１によってより強固に支持されるため、コラム２１により支持されるサドル３１の振動をさらに効果的に抑制することができる。 Further, the thickness Cb of the column 21 in the Z-axis direction at the second position Pb below the first position Pa is greater than the thickness Ca of the column 21 in the Z-axis direction at the first position Pa. With such a configuration, the thickness of the column 21 on the lower end side supported by the bed 11 is sufficiently ensured. As a result, the column 21 is more firmly supported by the bed 11, so that the vibration of the saddle 31 supported by the column 21 can be suppressed more effectively.
　また、フレーム部２１１は、第１漸減部２３６と、第２漸減部２３７とを有する。第１漸減部２３６では、Ｚ軸方向におけるフレーム部２１１の厚みＢが第１位置Ｐａから上端部２２１に向かうに従って減少し、第２漸減部２３７では、Ｚ軸方向におけるフレーム部２１１の厚みＢが第１位置Ｐａから下端部２２２に向かうに従って減少するため、サドル３１の重量を低減することができる。 The frame portion 211 also has a first gradually decreasing portion 236 and a second gradually decreasing portion 237 . At the first gradually decreasing portion 236, the thickness B of the frame portion 211 in the Z-axis direction decreases from the first position Pa toward the upper end portion 221, and at the second gradually decreasing portion 237, the thickness B of the frame portion 211 in the Z-axis direction decreases. The weight of the saddle 31 can be reduced since it decreases from the first position Pa toward the lower end portion 222 .
　図１０は、工具主軸がＹ軸方向において上方側のストローク端に位置決めされた場合の工作機械を示す側面図である。図１１は、工具主軸がＹ軸方向において下方側のストローク端に位置決めされた場合の工作機械を示す側面図である。 FIG. 10 is a side view showing the machine tool when the tool spindle is positioned at the upper stroke end in the Y-axis direction. FIG. 11 is a side view showing the machine tool when the tool spindle is positioned at the lower stroke end in the Y-axis direction.
　図１０を参照して、工具主軸９１が、Ｙ軸方向において上方側のストローク端に位置決めされている場合に、工具主軸９１の回転中心軸１１０は、Ｙ軸方向において第５位置Ｐｅに配置されている。第５位置Ｐｅは、Ｙ軸方向において第１位置Ｐａよりも上方に位置している。第５位置Ｐｅは、Ｙ軸方向において、第１位置Ｐａおよび第３位置Ｐｃの間に位置している。第５位置Ｐｅは、第１位置Ｐａと同じ高さに位置してもよい。 Referring to FIG. 10, when the tool spindle 91 is positioned at the upper stroke end in the Y-axis direction, the rotation center axis 110 of the tool spindle 91 is arranged at the fifth position Pe in the Y-axis direction. ing. The fifth position Pe is located above the first position Pa in the Y-axis direction. The fifth position Pe is positioned between the first position Pa and the third position Pc in the Y-axis direction. The fifth position Pe may be located at the same height as the first position Pa.
　このような構成によれば、工具主軸９１がＹ軸方向において上方側のストローク端に移動した場合であっても、Ｚ軸方向におけるフレーム部２１１の厚みＢを第１位置Ｐａで最大とすることによって、サドル３１の振動を効果的に抑制することができる。 According to such a configuration, even when the tool spindle 91 moves to the upper stroke end in the Y-axis direction, the thickness B of the frame portion 211 in the Z-axis direction is maximized at the first position Pa. Therefore, the vibration of the saddle 31 can be effectively suppressed.
　図１１を参照して、工具主軸９１が、Ｙ軸方向において下方側のストローク端に位置決めされている場合に、工具主軸９１の回転中心軸１１０は、Ｙ軸方向において第６位置Ｐｆに配置されている。第６位置Ｐｆは、Ｙ軸方向において、第４位置Ｐｄよりも下方に位置している。第６位置Ｐｆは、Ｙ軸方向において、第４位置Ｐｄと同じ高さ、または、第４位置Ｐｄよりも上方に位置してもよい。第６位置Ｐｆは、Ｙ軸方向において、第２位置Ｐｂよりも上方に位置している。 Referring to FIG. 11, when the tool spindle 91 is positioned at the lower stroke end in the Y-axis direction, the rotation center axis 110 of the tool spindle 91 is arranged at the sixth position Pf in the Y-axis direction. ing. The sixth position Pf is located below the fourth position Pd in the Y-axis direction. The sixth position Pf may be located at the same height as the fourth position Pd or above the fourth position Pd in the Y-axis direction. The sixth position Pf is located above the second position Pb in the Y-axis direction.
　以上に説明した、この発明の実施の形態における工作機械１００の構造についてまとめると、本実施の形態における工作機械１００は、ベッド１１と、ベッド１１上に立設されるコラム２１と、コラム２１により支持される移動体であるサドル３１と、サドル３１により支持され、水平方向に平行な第１軸方向としてのＺ軸方向に延びる回転中心軸１１０を中心に工具を回転させる工具主軸９１とを備える。サドル３１は、工具主軸９１を取り囲むように設けられるフレーム部２１１を有する。Ｚ軸方向におけるフレーム部２１１の厚みＢは、鉛直方向に平行な第２軸方向としてのＹ軸方向に沿って変化し、フレーム部２１１の下端部２２２よりもフレーム部２１１の上端部２２１寄りの第１位置Ｐａで最大となる。 To summarize the structure of machine tool 100 according to the embodiment of the present invention described above, machine tool 100 according to the present embodiment comprises bed 11, column 21 erected on bed 11, and column 21. A saddle 31 which is a supported moving body, and a tool spindle 91 which is supported by the saddle 31 and which rotates the tool around a rotation center axis 110 extending in the Z-axis direction as the first axial direction parallel to the horizontal direction. . The saddle 31 has a frame portion 211 that surrounds the tool spindle 91 . The thickness B of the frame portion 211 in the Z-axis direction varies along the Y-axis direction as the second axial direction parallel to the vertical direction, and is closer to the upper end portion 221 of the frame portion 211 than the lower end portion 222 of the frame portion 211 . It becomes maximum at the first position Pa.
　このように構成された、この発明の実施の形態における工作機械１００によれば、サドル３１の重量を低減するとともに、ワーク加工時のサドル３１の振動を抑制することができる。これにより、ワークの加工精度を向上させることができる。 According to the machine tool 100 according to the embodiment of the present invention configured in this manner, the weight of the saddle 31 can be reduced, and vibration of the saddle 31 during machining of the workpiece can be suppressed. Thereby, the machining accuracy of the workpiece can be improved.
　なお、本発明は、横形マシニングセンタに限られず、たとえば、水平方向に延びる回転中心軸を中心に工具を回転させる工具主軸と、ワークを回転させるワーク主軸とを備え、旋削機能およびミーリング機能を有する複合加工機であってもよい。 The present invention is not limited to a horizontal machining center. It may be a processing machine.
　今回開示された実施の形態はすべての点で例示であって制限的なものではないと考えられるべきである。本発明の範囲は上記した説明ではなくて請求の範囲によって示され、請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。 The embodiments disclosed this time should be considered illustrative in all respects and not restrictive. The scope of the present invention is indicated by the scope of the claims rather than the above description, and is intended to include all changes within the scope and meaning equivalent to the scope of the claims.
　この発明は、主に、横形マシニングセンタまたは複合加工機等の工作機械に適用される。 This invention is mainly applied to machine tools such as horizontal machining centers or multitasking machines.
　１１　ベッド、１２　第１周壁部、１２ａ　第１頂面、１３　第２周壁部、１３ａ　第２頂面、１４　第１段差部、１４ａ　第３頂面、１５　第２段差部、１５ａ　第４頂面、２１　コラム、２２　第１送り装置、２３　第２送り装置、２６　第１ガイド部、２７　第２ガイド部、３１　サドル、４１　クロススライド、４２，４３，５２，５３　送り装置、４６，４７，５８，５９　ガイド部、５１　テーブル、６１　ワーク保持部、７１　テーブルベース、９１　工具主軸、１００　工作機械、１１０　回転中心軸、１３０　回転中心軸、２０１　仮想平面、２１０　開口部、２１１　フレーム部、２１２　第１側壁部、２１３　第２側壁部、２１４　上壁部、２１５　下壁部、２１６　第１モータ取り付け部、２１７　第２モータ取り付け部、２１８　第１ナット取り付け部、２１９　第２ナット取り付け部、２２０　中間リブ部、２２１　上端部、２２２　下端部、２２６　第５ガイド取り付け面、２２７　第６ガイド取り付け面、２３１　第１ガイド取り付け面、２３２　第２ガイド取り付け面、２３６　第１漸減部、２３７　第２漸減部、２４１，２４６　サーボモータ、２４２，２４７　ネジ軸、２４３　ナット、２５１，２５６　レール、２５２，２５３，２５７，２５８　スライダー、２６１　第３ガイド取り付け面、２６２　第４ガイド取り付け面、Ｐａ　第１位置、Ｐｂ　第２位置、Ｐｃ　第３位置、Ｐｄ　第４位置、Ｐｅ　第５位置、Ｐｆ　第６位置、Ｐｈ　中間位置。 11 bed, 12 first peripheral wall portion, 12a first top surface, 13 second peripheral wall portion, 13a second top surface, 14 first stepped portion, 14a third top surface, 15 second stepped portion, 15a fourth top surface , 21 column, 22 first feeding device, 23 second feeding device, 26 first guide part, 27 second guide part, 31 saddle, 41 cross slide, 42, 43, 52, 53 feeding device, 46, 47, 58 , 59 guide part, 51 table, 61 work holding part, 71 table base, 91 tool spindle, 100 machine tool, 110 rotation center axis, 130 rotation center axis, 201 virtual plane, 210 opening, 211 frame part, 212 first Side wall portion 213 Second side wall portion 214 Upper wall portion 215 Lower wall portion 216 First motor mounting portion 217 Second motor mounting portion 218 First nut mounting portion 219 Second nut mounting portion 220 Intermediate rib 221 upper end portion 222 lower end portion 226 fifth guide mounting surface 227 sixth guide mounting surface 231 first guide mounting surface 232 second guide mounting surface 236 first gradually decreasing portion 237 second gradually decreasing portion 241, 246 servo motor, 242, 247 screw shaft, 243 nut, 251, 256 rail, 252, 253, 257, 258 slider, 261 third guide mounting surface, 262 fourth guide mounting surface, Pa first position, Pb th 2 position, Pc 3rd position, Pd 4th position, Pe 5th position, Pf 6th position, Ph Intermediate position.

Claims (7)

  1. 　ベッドと、
    　前記ベッド上に立設されるコラムと、
    　前記コラムにより支持される移動体であるサドルと、
    　前記サドルにより支持され、水平方向に平行な第１軸方向に延びる回転中心軸を中心に工具を回転させる工具主軸とを備え、
    　前記サドルは、前記工具主軸を取り囲むように設けられるフレーム部を有し、
    　前記第１軸方向における前記フレーム部の厚みは、鉛直方向に平行な第２軸方向に沿って変化し、前記フレーム部の下端部よりも前記フレーム部の上端部寄りの第１位置で最大となる、工作機械。     bed and
    a column erected on the bed;
    a saddle that is a moving body supported by the column;
    a tool spindle that is supported by the saddle and rotates the tool around a rotation center axis that extends in a first axial direction parallel to the horizontal direction;
    The saddle has a frame portion that surrounds the tool spindle,
    The thickness of the frame portion in the first axial direction varies along a second axial direction parallel to the vertical direction, and is maximum at a first position closer to the upper end portion of the frame portion than the lower end portion of the frame portion. Become a machine tool.
  2. 　前記サドルは、前記コラムに対して、水平方向に平行で、かつ、前記第１軸方向に直交する第３軸方向に移動可能であり、
    　前記工具主軸は、前記サドルに対して、前記第２軸方向に移動可能であり、さらに、
    　前記サドルを前記第３軸方向に案内し、前記第２軸方向において前記第１位置に配置される第１ガイド部を備える、請求項１に記載の工作機械。     the saddle is movable with respect to the column in a third axis that is horizontally parallel and orthogonal to the first axis;
    The tool spindle is movable in the second axial direction with respect to the saddle, and
    2. The machine tool according to claim 1, further comprising a first guide portion that guides the saddle in the third axial direction and is arranged at the first position in the second axial direction.
  3. 　前記サドルを前記第３軸方向に案内し、前記第２軸方向において前記第１位置よりも下方の第２位置に配置される第２ガイド部をさらに備え、
    　前記第２位置での前記第１軸方向における前記コラムの厚みは、前記第１位置での前記第１軸方向における前記コラムの厚みよりも大きい、請求項２に記載の工作機械。     further comprising a second guide portion that guides the saddle in the third axial direction and is arranged at a second position lower than the first position in the second axial direction;
    3. The machine tool of claim 2, wherein the thickness of the column in the first axial direction at the second position is greater than the thickness of the column in the first axial direction at the first position.
  4. 　前記コラムは、前記第１ガイド部および前記第２ガイド部がそれぞれ取り付けられる第１ガイド取り付け面および第２ガイド取り付け面を有し、
    　前記サドルは、前記第１軸方向において前記第１ガイド取り付け面および前記第２ガイド取り付け面とそれぞれ対向し、前記第１ガイド部および前記第２ガイド部がそれぞれ取り付けられる第３ガイド取り付け面および第４ガイド取り付け面を有する、請求項３に記載の工作機械。     the column has a first guide mounting surface and a second guide mounting surface to which the first guide portion and the second guide portion are mounted, respectively;
    The saddle faces the first guide mounting surface and the second guide mounting surface in the first axial direction, and has a third guide mounting surface and a third guide mounting surface to which the first guide section and the second guide section are mounted, respectively. 4. The machine tool of claim 3, having four guide mounting surfaces.
  5. 　前記第２軸方向において前記第２ガイド部よりも前記第１ガイド部寄りの位置に配置され、前記サドルを前記第３軸方向に駆動させる第１送り装置と、
    　前記第２軸方向において前記第１ガイド部よりも前記第２ガイド部寄りの位置に設けられ、前記サドルを前記第３軸方向に駆動させる第２送り装置とをさらに備える、請求項３または４に記載の工作機械。     a first feeding device arranged at a position closer to the first guide portion than the second guide portion in the second axial direction and configured to drive the saddle in the third axial direction;
    5. A second feeding device provided at a position closer to said second guide than said first guide in said second axial direction and driving said saddle in said third axial direction. The machine tool described in .
  6. 　前記フレーム部は、前記第１軸方向における前記フレーム部の厚みが、前記第２軸方向において、前記第１位置から前記フレーム部の上端部に向かうに従って減少する第１漸減部と、前記第１軸方向における前記フレーム部の厚みが、前記第２軸方向において、前記第１位置から前記フレーム部の下端部に向かうに従って減少する第２漸減部とを含む、請求項１から５のいずれか１項に記載の工作機械。 The frame portion has a first gradually decreasing portion in which the thickness of the frame portion in the first axial direction decreases from the first position toward an upper end portion of the frame portion in the second axial direction, and the first 6. Any one of claims 1 to 5, wherein the thickness of the frame portion in the axial direction includes a second gradually decreasing portion in which the thickness in the second axial direction decreases from the first position toward the lower end portion of the frame portion. Machine tool according to paragraph.
  7. 　前記工具主軸は、前記サドルに対して、前記第２軸方向に移動可能であり、
    　前記工具主軸が前記第２軸方向において上方側のストローク端に位置決めされた場合に、前記回転中心軸は、前記第２軸方向において、前記第１位置と同じ高さ、または、前記第１位置よりも上方に位置する、請求項１から６のいずれか１項に記載の工作機械。     the tool spindle is movable in the second axial direction with respect to the saddle;
    When the tool spindle is positioned at the upper stroke end in the second axial direction, the rotation center axis is at the same height as the first position or at the first position in the second axial direction. 7. The machine tool according to any one of claims 1 to 6, located above.
PCT/JP2021/015559 2021-04-15 2021-04-15 Machine tool WO2022219773A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP21936969.1A EP4324591A1 (en) 2021-04-15 2021-04-15 Machine tool
CN202180097072.0A CN117157168A (en) 2021-04-15 2021-04-15 Machine tool
JP2023514271A JPWO2022219773A1 (en) 2021-04-15 2021-04-15
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1199424A (en) * 1997-09-30 1999-04-13 Nippei Toyama Corp Main spindle head supporting structure of machine tool
JP2005028481A (en) * 2003-07-09 2005-02-03 Mori Seiki Co Ltd Machine tool
JP2005088099A (en) 2003-09-12 2005-04-07 Mori Seiki Co Ltd Machining centre
DE102004034873B3 (en) * 2004-07-19 2005-09-29 P & L Gmbh & Co. Kg Machine tool with one-piece bridge for machining has bridge closed by wall element made in one piece with bridge
WO2018146728A1 (en) * 2017-02-07 2018-08-16 株式会社牧野フライス製作所 Machine tool
WO2019053830A1 (en) * 2017-09-13 2019-03-21 株式会社牧野フライス製作所 Machine tool
JP2019077025A (en) * 2017-09-17 2019-05-23 ディッケル マホ ゼーバッハ ゲーエムベーハー Machine tool for machining a workpiece

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1199424A (en) * 1997-09-30 1999-04-13 Nippei Toyama Corp Main spindle head supporting structure of machine tool
JP2005028481A (en) * 2003-07-09 2005-02-03 Mori Seiki Co Ltd Machine tool
JP2005088099A (en) 2003-09-12 2005-04-07 Mori Seiki Co Ltd Machining centre
DE102004034873B3 (en) * 2004-07-19 2005-09-29 P & L Gmbh & Co. Kg Machine tool with one-piece bridge for machining has bridge closed by wall element made in one piece with bridge
WO2018146728A1 (en) * 2017-02-07 2018-08-16 株式会社牧野フライス製作所 Machine tool
WO2019053830A1 (en) * 2017-09-13 2019-03-21 株式会社牧野フライス製作所 Machine tool
JP2019077025A (en) * 2017-09-17 2019-05-23 ディッケル マホ ゼーバッハ ゲーエムベーハー Machine tool for machining a workpiece

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